City of Norwalk Water Dept. (CA) Water Quality

City of Norwalk Water Dept. is a large public water system in EPA region 9 that provides tap water for the 90650 zip codes. It has 18 facilities where the water supply was tested for 78 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 8.47 µg/L. The maximum reported level of Manganese was 130 µg/L. There were 2 contamintants found in the City of Norwalk Water Dept. water supply at levels that were above the minimum reporting level.

Table of Contents
Contaminants
Facilities
FAQ

Contaminants

Jump To Contaminant
1,1-dichloroethane
1,2,3-trichloropropane
1,3-butadiene
1,4-dioxane
1-butanol
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid
1H,1H,2H,2H-perfluorodecane sulfonic acid
1H,1H,2H,2H-perfluorohexane sulfonic acid
1H,1H,2H,2H-perfluorooctane sulfonic acid
2,4-dinitrotoluene
2,6-dinitrotoluene
2-methoxyethanol
2-propen-1-ol (Allyl Alcohol)
4,4'-dichloro dichlorophenyl ethylene (DDE)
4,8-dioxa-3H-perfluorononanoic acid
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid
alpha-hexachlorocyclohexane
anatoxin-a
bromochloromethane (Halon 1011)
bromomethane
Butylated Hydroxyanisole
chlorate
chlorodifluoromethane (HCFC-22)
chloromethane
chlorpyrifos
chromium
chromium-6
cobalt
cylindrospermopsin
dimethipin
dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate
ethoprop
Germanium
HAA5 (five regulated haloacetic acids)
HAA6Br (six brominated haloacetic acids)
HAA9 (nine haloacetic acids)
hexafluoropropylene oxide dimer acid (GenX)
lithium
Manganese
methyl-tertiary-butyl-ether (MTBE)
molinate
molybdenum
N-ethyl perfluorooctanesulfonamidoacetic acid
N-methyl perfluorooctanesulfonamidoacetic acid
nitrobenzene
nonafluoro-3,6-dioxaheptanoic acid
o-toluidine
oxyfluorfen
perchlorate
perfluoro(2-ethoxyethane)sulfonic acid
perfluoro-3-methoxypropanoic acid
perfluoro-4-methoxybutanoic acid
perfluorobutanesulfonic acid
perfluorobutanoic acid
perfluorodecanoic acid
perfluorododecanoic acid
perfluoroheptanesulfonic acid
perfluoroheptanoic acid
perfluorohexanesulfonic acid
perfluorohexanoic acid
perfluorononanoic acid
perfluorooctanesulfonic acid
perfluorooctanoic acid
perfluoropentanesulfonic acid
perfluoropentanoic acid
perfluorotetradecanoic acid
perfluorotridecanoic acid
perfluoroundecanoic acid
profenofos
quinoline
s-ethyl-dipropylthiocarbamate (EPTC)
strontium
tebuconazole
terbacil
total microcystins
Total Permethrin
tribufos
vanadium

1,1-dichloroethane (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.04 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.01 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.04 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.01 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

1,2,3-trichloropropane (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

1,3-butadiene (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.1 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.1 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.1 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.1 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.1 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.1 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.1 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.1 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.1 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.1 µg/L
Reference Level: ?

Contaminant Details

1,4-dioxane (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 2.03 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 2.03 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

6/3/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.07 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

4/30/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

3.3 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 3.23 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

1.8 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 1.73 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.07 µg/L
Reference Level: ?

Contaminant Details

1-butanol (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<2 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<2 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<2 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: 700 µg/L

Contaminant Details

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorodecane sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorohexane sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorooctane sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

2,4-dinitrotoluene (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

2,6-dinitrotoluene (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

2-methoxyethanol (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.4 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.4 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.4 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.4 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.4 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.4 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.4 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.4 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.4 µg/L
Reference Level: 21 µg/L

Contaminant Details

2-propen-1-ol (Allyl Alcohol) (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.5 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.5 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.5 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.5 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.5 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.5 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.5 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.5 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.5 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.5 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.5 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.5 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.5 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.5 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.5 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.5 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.5 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.5 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.5 µg/L
Reference Level: 35 µg/L

Contaminant Details

4,4'-dichloro dichlorophenyl ethylene (DDE) (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<0.8 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<0.8 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<0.8 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 0.8 µg/L
Reference Level: ?

Contaminant Details

4,8-dioxa-3H-perfluorononanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

alpha-hexachlorocyclohexane (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.01 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.01 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.01 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.01 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.01 µg/L
Reference Level: 0.006 µg/L

Contaminant Details

anatoxin-a (24)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/15/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

10/15/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/15/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

9/24/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

9/24/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

9/24/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

9/10/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

9/10/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

9/10/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/22/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/22/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/22/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/8/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/8/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/8/2020

5 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

bromochloromethane (Halon 1011) (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.06 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.06 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.06 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.06 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.076 µg/L

⚠️ Exceeds Reporting Level of 0.06 µg/L by 0.016 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.06 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.06 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.06 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.06 µg/L

Below Reporting Level

4/4/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.1 µg/L

⚠️ Exceeds Reporting Level of 0.06 µg/L by 0.04 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.06 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.06 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.06 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.06 µg/L
Reference Level: ?

Contaminant Details

bromomethane (18)

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.7 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.5 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.2 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

0.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

Butylated Hydroxyanisole (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

chlorate (35)

Northern Pressure Zone

City of Santa Fe Springs ℹ️

130 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 110 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

96 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 76 µg/L

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

96 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 76 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

52 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 32 µg/L

10/29/2013

11 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

45 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 25 µg/L

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<20 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

160 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 140 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

160 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 140 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

160 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 140 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

150 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 130 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

140 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 120 µg/L

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

140 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 120 µg/L

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

94 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 74 µg/L

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

90 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 70 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

67 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 47 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

57 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 37 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

49 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 29 µg/L

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<20 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

110 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 90 µg/L

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

110 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 90 µg/L

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

53 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 33 µg/L

4/30/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

49 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 29 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

41 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 21 µg/L

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<20 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

93 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 73 µg/L

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

81 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 61 µg/L

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

78 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 58 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

46 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 26 µg/L

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

41 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 21 µg/L

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

41 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 21 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

36 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 16 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

23 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 3 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

22 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 2 µg/L

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<20 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

<20 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 20 µg/L
Reference Level: ?

Contaminant Details

chlorodifluoromethane (HCFC-22) (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.08 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.08 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.08 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.23 µg/L

⚠️ Exceeds Reporting Level of 0.08 µg/L by 0.15 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.22 µg/L

⚠️ Exceeds Reporting Level of 0.08 µg/L by 0.14 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.08 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.08 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.08 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.08 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.08 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.08 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.08 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.08 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.08 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.16 µg/L

⚠️ Exceeds Reporting Level of 0.08 µg/L by 0.08 µg/L

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.13 µg/L

⚠️ Exceeds Reporting Level of 0.08 µg/L by 0.05 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.08 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.08 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.08 µg/L
Reference Level: ?

Contaminant Details

chloromethane (18)

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.3 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.2 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

chlorpyrifos (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: 2 µg/L

Contaminant Details

chromium (36)

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.8 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

1.7 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.5 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

1.7 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.5 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

1.6 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.4 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

1.6 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.4 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.3 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.2 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

4/30/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.3 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

1.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.2 µg/L

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

1.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.1 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

1.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.1 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.6 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.4 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

chromium-6 (35)

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

1.2 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.17 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

0.08 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.05 µg/L

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

0.05 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.02 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.04 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.01 µg/L

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.47 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.47 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.47 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.47 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.46 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.43 µg/L

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

0.08 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.05 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

0.05 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.02 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

0.05 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.02 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.44 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.41 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

0.099 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.069 µg/L

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.088 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.058 µg/L

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

1.7 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.67 µg/L

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

1.6 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.57 µg/L

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

1.6 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.57 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

1.6 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.57 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

0.52 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.49 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

0.081 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.051 µg/L

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

0.069 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.039 µg/L

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.035 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.005 µg/L

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

cobalt (36)

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

1.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.2 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<1 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<1 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<1 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

10/29/2013

11 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

1.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.2 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

4/30/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

cylindrospermopsin (24)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

10/15/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

10/15/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

10/15/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

9/24/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

9/24/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

9/24/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

9/10/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

9/10/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

9/10/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

8/13/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

8/13/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

8/13/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

7/22/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

7/22/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

7/22/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

7/8/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

7/8/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

7/8/2020

5 years ago

Minimum Reporting Level: 0.09 µg/L
Reference Level: 0.7 µg/L

Contaminant Details

dimethipin (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: 140 µg/L

Contaminant Details

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<1 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<1 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<1 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

ethoprop (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: 1.14 µg/L

Contaminant Details

Germanium (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.3 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

HAA5 (five regulated haloacetic acids) (28)

11727 Potter Street

Potter Street ℹ️

8.47 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

7.57 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

16321 Alora Ave.

Alora ℹ️

4.6 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

11904 Corby Ave

Corby ℹ️

4.5 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

Cabrillo ave

Cabrillo ℹ️

4.37 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

15623 Lancelot Ave.

Lancelot ℹ️

0.86 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

8.36 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

6.31 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

5.86 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

11904 Corby Ave

Corby ℹ️

5.61 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.2 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

0.72 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.69 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

0.63 µg/L

Meets Reporting Threshold

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

6.2 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

5.39 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

5.2 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

11904 Corby Ave

Corby ℹ️

4.64 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

2 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

1.32 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

6.06 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

5.8 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

5.8 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

11904 Corby Ave

Corby ℹ️

5.28 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.2 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

1.06 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

0.59 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.5 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

Minimum Reporting Level: 0.5 µg/L
Reference Level: 60 µg/L

Contaminant Details

HAA6Br (six brominated haloacetic acids) (28)

11727 Potter Street

Potter Street ℹ️

11.07 µg/L

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

9.47 µg/L

11/12/2020

4 years ago

16321 Alora Ave.

Alora ℹ️

4.15 µg/L

11/12/2020

4 years ago

11904 Corby Ave

Corby ℹ️

3.87 µg/L

11/12/2020

4 years ago

Cabrillo ave

Cabrillo ℹ️

3.86 µg/L

11/12/2020

4 years ago

15623 Lancelot Ave.

Lancelot ℹ️

1.81 µg/L

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

10.96 µg/L

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

4.91 µg/L

8/13/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

4.55 µg/L

8/13/2020

5 years ago

11904 Corby Ave

Corby ℹ️

4.5 µg/L

8/13/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

1.78 µg/L

8/13/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.58 µg/L

8/13/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

1.45 µg/L

8/13/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.69 µg/L

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

6.2 µg/L

5/21/2020

5 years ago

11904 Corby Ave

Corby ℹ️

5.74 µg/L

5/21/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

5.19 µg/L

5/21/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

4.8 µg/L

5/21/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

3.25 µg/L

5/21/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

2.04 µg/L

5/21/2020

5 years ago

11904 Corby Ave

Corby ℹ️

7.8 µg/L

2/12/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

7.29 µg/L

2/12/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

7.25 µg/L

2/12/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

6.83 µg/L

2/12/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

1.99 µg/L

2/12/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.2 µg/L

2/12/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

0.95 µg/L

2/12/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.5 µg/L

2/12/2020

5 years ago

Minimum Reporting Level: 0 µg/L
Reference Level: ?

Contaminant Details

HAA9 (nine haloacetic acids) (28)

11727 Potter Street

Potter Street ℹ️

15.77 µg/L

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

13.87 µg/L

11/12/2020

4 years ago

11904 Corby Ave

Corby ℹ️

7.51 µg/L

11/12/2020

4 years ago

16321 Alora Ave.

Alora ℹ️

7.45 µg/L

11/12/2020

4 years ago

Cabrillo ave

Cabrillo ℹ️

7.44 µg/L

11/12/2020

4 years ago

15623 Lancelot Ave.

Lancelot ℹ️

1.81 µg/L

11/12/2020

4 years ago

14517 Brink Ave.

Brink ℹ️

15.66 µg/L

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

10.41 µg/L

8/13/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

9.75 µg/L

8/13/2020

5 years ago

11904 Corby Ave

Corby ℹ️

9.5 µg/L

8/13/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

1.78 µg/L

8/13/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.58 µg/L

8/13/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

1.45 µg/L

8/13/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.69 µg/L

8/13/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

11 µg/L

5/21/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

9.59 µg/L

5/21/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

9.3 µg/L

5/21/2020

5 years ago

11904 Corby Ave

Corby ℹ️

8.44 µg/L

5/21/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

3.85 µg/L

5/21/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

2.47 µg/L

5/21/2020

5 years ago

11727 Potter Street

Potter Street ℹ️

11.15 µg/L

2/12/2020

5 years ago

14517 Brink Ave.

Brink ℹ️

10.85 µg/L

2/12/2020

5 years ago

Cabrillo ave

Cabrillo ℹ️

10.63 µg/L

2/12/2020

5 years ago

11904 Corby Ave

Corby ℹ️

10.18 µg/L

2/12/2020

5 years ago

16321 Alora Ave.

Alora ℹ️

2.22 µg/L

2/12/2020

5 years ago

13516 Studebaker Rd.

Studebaker ℹ️

1.2 µg/L

2/12/2020

5 years ago

15623 Lancelot Ave.

Lancelot ℹ️

0.95 µg/L

2/12/2020

5 years ago

13532 Flallon Ave

Flallon ℹ️

0.5 µg/L

2/12/2020

5 years ago

Minimum Reporting Level: 0 µg/L
Reference Level: ?

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

lithium (20)

Cabrillo ave

Cabrillo ℹ️

26 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 17 µg/L

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

25 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 16 µg/L

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

25 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 16 µg/L

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

21 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 12 µg/L

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

43 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 34 µg/L

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

43 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 34 µg/L

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

43 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 34 µg/L

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

39 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 30 µg/L

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<9 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<9 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

59 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 50 µg/L

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

58 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 49 µg/L

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

58 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 49 µg/L

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

58 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 49 µg/L

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

57 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 48 µg/L

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

57 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 48 µg/L

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

56 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 47 µg/L

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

56 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 47 µg/L

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<9 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<9 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 9 µg/L
Reference Level: ?

Contaminant Details

Manganese (18)

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

23 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

1.4 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

1.4 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

1.3 µg/L

Meets Reporting Threshold

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

5.1 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

2.8 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

2.7 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.2 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.4 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.1 µg/L

Meets Reporting Threshold

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

1.4 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

1.3 µg/L

Meets Reporting Threshold

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.4 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

130 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

23 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

3.6 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.49 µg/L

Meets Reporting Threshold

2/12/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.4 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.4 µg/L
Reference Level: 300 µg/L

Contaminant Details

methyl-tertiary-butyl-ether (MTBE) (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<5 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<5 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<5 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 5 µg/L
Reference Level: ?

Contaminant Details

molinate (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<0.9 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<0.9 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<0.9 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 0.9 µg/L
Reference Level: ?

Contaminant Details

molybdenum (36)

DSMRT for Cerritos

Distribution System - SW ℹ️

5.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 4.4 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

4.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.2 µg/L

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

4.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.2 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

4.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.1 µg/L

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

4.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.1 µg/L

10/29/2013

11 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

2.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.4 µg/L

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

19 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 18 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

4.5 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.5 µg/L

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

4.5 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.5 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

4.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.4 µg/L

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

4.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.4 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

4.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.3 µg/L

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

4.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.3 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

3.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2.4 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

2.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.3 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.3 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

2.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.3 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.1 µg/L

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

22 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 21 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

4.5 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.5 µg/L

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

4.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.3 µg/L

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

4.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.2 µg/L

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

4.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.1 µg/L

4/30/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

3.4 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2.4 µg/L

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

9.7 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 8.7 µg/L

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

4.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.3 µg/L

1/31/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

4.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.3 µg/L

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

4.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.2 µg/L

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

4.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 3.1 µg/L

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

3.6 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2.6 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

3.5 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2.5 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2 µg/L

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.7 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.7 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

2.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.2 µg/L

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.1 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 1.1 µg/L

1/31/2013

12 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.006 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.006 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.006 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.006 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.006 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.006 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.006 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.006 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.006 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.006 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.006 µg/L
Reference Level: ?

Contaminant Details

nitrobenzene (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<10 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<10 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<10 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 10 µg/L
Reference Level: ?

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.02 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: ?

Contaminant Details

o-toluidine (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.007 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.007 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.007 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.007 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.007 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.007 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.007 µg/L
Reference Level: ?

Contaminant Details

oxyfluorfen (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.05 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.05 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.05 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.05 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.05 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.05 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.05 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.05 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.05 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.05 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.05 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.05 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.05 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.05 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.05 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.05 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.05 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.05 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.05 µg/L
Reference Level: 200 µg/L

Contaminant Details

perchlorate (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<4 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<4 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<4 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 4 µg/L
Reference Level: ?

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoro-3-methoxypropanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoro-4-methoxybutanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanesulfonic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.09 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.09 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.09 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.09 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.09 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.09 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

11/20/2024

9 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0055 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0005 µg/L

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

5/20/2024

15 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0056 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0006 µg/L

2/27/2024

18 months ago

Cabrillo ave

Cabrillo ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.005 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

perfluorodecanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorododecanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanesulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanoic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.01 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.01 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.01 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.01 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.01 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.01 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanesulfonic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.0073 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0043 µg/L

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0073 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0043 µg/L

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.0076 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0046 µg/L

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0071 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0041 µg/L

2/27/2024

18 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.03 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.03 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.03 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.03 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.03 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorononanoic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanesulfonic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.026 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.022 µg/L

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.022 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.018 µg/L

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.024 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.02 µg/L

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.016 µg/L

2/27/2024

18 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.04 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.04 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.04 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanoic acid (37)

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0051 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0011 µg/L

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.0049 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0009 µg/L

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0052 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0012 µg/L

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

0.0047 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0007 µg/L

2/27/2024

18 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2013

11 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

6/3/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

4/4/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

3/18/2013

12 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanesulfonic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.004 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

11/20/2024

9 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

0.0034 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0004 µg/L

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.003 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorotetradecanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.008 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.008 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.008 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.008 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.008 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.008 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.008 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.008 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.008 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.008 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.008 µg/L
Reference Level: ?

Contaminant Details

perfluorotridecanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.007 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.007 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.007 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.007 µg/L
Reference Level: ?

Contaminant Details

perfluoroundecanoic acid (20)

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

11/20/2024

9 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

8/26/2024

12 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

5/20/2024

15 months ago

Cabrillo ave

Cabrillo ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.002 µg/L

Below Reporting Level

2/27/2024

18 months ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

profenofos (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.3 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.3 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.3 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

quinoline (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.02 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.02 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.02 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.02 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.02 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.02 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: 0.01 µg/L

Contaminant Details

s-ethyl-dipropylthiocarbamate (EPTC) (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<1 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<1 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<1 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

strontium (36)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

860 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 859.7 µg/L

10/29/2013

11 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

660 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 659.7 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

570 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 569.7 µg/L

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

540 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 539.7 µg/L

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

430 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 429.7 µg/L

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

410 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 409.7 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

940 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 939.7 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

830 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 829.7 µg/L

7/29/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

780 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 779.7 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

780 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 779.7 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

770 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 769.7 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

760 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 759.7 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

750 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 749.7 µg/L

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

710 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 709.7 µg/L

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

610 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 609.7 µg/L

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

470 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 469.7 µg/L

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

450 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 449.7 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

440 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 439.7 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

890 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 889.7 µg/L

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

770 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 769.7 µg/L

4/30/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

760 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 759.7 µg/L

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

620 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 619.7 µg/L

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

480 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 479.7 µg/L

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

440 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 439.7 µg/L

4/30/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

780 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 779.7 µg/L

1/31/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

770 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 769.7 µg/L

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

760 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 759.7 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

750 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 749.7 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

700 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 699.7 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

700 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 699.7 µg/L

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

670 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 669.7 µg/L

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

570 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 569.7 µg/L

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

510 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 509.7 µg/L

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

450 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 449.7 µg/L

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

440 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 439.7 µg/L

1/31/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

410 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 409.7 µg/L

1/31/2013

12 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

tebuconazole (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.2 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.2 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: 190 µg/L

Contaminant Details

terbacil (4)

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

11/20/2002

22 years ago

LEFFINGWELL WELL 04 03S/12W-13L01

LEFFINGWELL WELL 04 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

TADDY WELL 05 03S/12W-13Q01

TADDY WELL 05 ℹ️

<2 µg/L

Below Reporting Level

6/19/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

total microcystins (24)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

10/15/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

10/15/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

10/15/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

9/24/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

9/24/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

9/24/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

9/10/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

9/10/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

9/10/2020

4 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

7/22/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

7/22/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

7/22/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.3 µg/L

Below Reporting Level

7/8/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.3 µg/L

Below Reporting Level

7/8/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.3 µg/L

Below Reporting Level

7/8/2020

5 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

Total Permethrin (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.04 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.04 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.04 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.04 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.04 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.04 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.04 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.04 µg/L
Reference Level: 3.344 µg/L

Contaminant Details

tribufos (18)

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

11/12/2020

4 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

11/12/2020

4 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.07 µg/L

Below Reporting Level

11/12/2020

4 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2020

5 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

<0.07 µg/L

Below Reporting Level

6/23/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

5/21/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

5/21/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

5/21/2020

5 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

<0.07 µg/L

Below Reporting Level

2/12/2020

5 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

<0.07 µg/L

Below Reporting Level

2/12/2020

5 years ago

Southern Pressure Zone

City of Cerritos ℹ️

<0.07 µg/L

Below Reporting Level

2/12/2020

5 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

<0.07 µg/L

Below Reporting Level

2/12/2020

5 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

<0.07 µg/L

Below Reporting Level

2/12/2020

5 years ago

Minimum Reporting Level: 0.07 µg/L
Reference Level: 0.6 µg/L

Contaminant Details

vanadium (36)

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

3.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 3.1 µg/L

10/29/2013

11 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

2.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.6 µg/L

10/29/2013

11 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

1.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.9 µg/L

10/29/2013

11 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.8 µg/L

10/29/2013

11 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.9 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.7 µg/L

10/29/2013

11 years ago

DSMRT for MWD

Distribution System - SW ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

10/29/2013

11 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

3.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 3 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

3.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 3 µg/L

7/29/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

3.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 3 µg/L

7/29/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

3.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.9 µg/L

7/29/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

3.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.9 µg/L

7/29/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

2.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.6 µg/L

7/29/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

1.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.6 µg/L

7/29/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

1.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1 µg/L

7/29/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.8 µg/L

7/29/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.9 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.7 µg/L

7/29/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

0.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.6 µg/L

7/29/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

7/29/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

2.9 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.7 µg/L

4/30/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

2.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.6 µg/L

4/30/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

1.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.3 µg/L

4/30/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

0.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.6 µg/L

4/30/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.6 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.4 µg/L

4/30/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

0.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.2 µg/L

4/30/2013

12 years ago

EP #11 - Taddy Well 5 Treated

Taddy Well 5 ℹ️

2.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.6 µg/L

1/31/2013

12 years ago

EP #10 - Leffingwell Well 4 Treated

Leffingwell Well 4 ℹ️

2.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.6 µg/L

1/31/2013

12 years ago

DSMRT for Santa Fe Springs

Distribution System - SW ℹ️

2.6 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.4 µg/L

1/31/2013

12 years ago

DSMRT for Taddy Well 5

Distribution System - GW ℹ️

2.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.2 µg/L

1/31/2013

12 years ago

DSMRT for Leffingwell Well 4

Distribution System - GW ℹ️

2.4 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.2 µg/L

1/31/2013

12 years ago

Imperial Highway @ Norwalk Blvd.

MWD Intertie ℹ️

2.2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2 µg/L

1/31/2013

12 years ago

EP #12 - Norwalk Park Well 10 Treated

Norwalk Park Well 10 ℹ️

1.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.9 µg/L

1/31/2013

12 years ago

Southern Pressure Zone

City of Cerritos ℹ️

0.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.6 µg/L

1/31/2013

12 years ago

DSMRT for Cerritos

Distribution System - SW ℹ️

0.8 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.6 µg/L

1/31/2013

12 years ago

Northern Pressure Zone

City of Santa Fe Springs ℹ️

0.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.3 µg/L

1/31/2013

12 years ago

DSMRT for MWD

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

DSMRT for Norwalk Park Well 10

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

1/31/2013

12 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

Sampling Facilities

Cabrillo
Surface Water (SW)

Cabrillo aveEntry Point to the Distribution System (EP)

Taddy Well 5
Ground Water (GW)

EP #11 - Taddy Well 5 TreatedEntry Point to the Distribution System (EP)

Leffingwell Well 4
Ground Water (GW)

EP #10 - Leffingwell Well 4 TreatedEntry Point to the Distribution System (EP)

MWD Intertie
Surface Water (SW)

Imperial Highway @ Norwalk Blvd.Entry Point to the Distribution System (EP)

City of Cerritos
Surface Water (SW)

Southern Pressure ZoneEntry Point to the Distribution System (EP)

City of Santa Fe Springs
Surface Water (SW)

Northern Pressure ZoneEntry Point to the Distribution System (EP)

Potter Street
Multiple Sources (MX)

11727 Potter StreetDistribution System (DS)

Corby
Multiple Sources (MX)

11904 Corby AveDistribution System (DS)

Studebaker
Ground Water (GW)

13516 Studebaker Rd.Distribution System (DS)

Flallon
Ground Water (GW)

13532 Flallon AveDistribution System (DS)

Brink
Multiple Sources (MX)

14517 Brink Ave.Distribution System (DS)

Lancelot
Multiple Sources (MX)

15623 Lancelot Ave.Distribution System (DS)

Alora
Multiple Sources (MX)

16321 Alora Ave.Distribution System (DS)

Norwalk Park Well 10
Ground Water (GW)

EP #12 - Norwalk Park Well 10 TreatedEntry Point to the Distribution System (EP)

Distribution System - SW
Surface Water (SW)

DSMRT for MWDMaximum Residence Time (MR)

DSMRT for CerritosMaximum Residence Time (MR)

DSMRT for Santa Fe SpringsMaximum Residence Time (MR)

Distribution System - GW
Ground Water (GW)

DSMRT for Taddy Well 5Maximum Residence Time (MR)

DSMRT for Leffingwell Well 4Maximum Residence Time (MR)

DSMRT for Norwalk Park Well 10Maximum Residence Time (MR)

LEFFINGWELL WELL 04
Ground Water (GW)

LEFFINGWELL WELL 04 03S/12W-13L01SR (SR)

TADDY WELL 05
Ground Water (GW)

TADDY WELL 05 03S/12W-13Q01SR (SR)

FAQ

Is City of Norwalk Water Dept. tap water safe to drink?

When was City of Norwalk Water Dept. last tested for water contamination?

The latest water samples were taken on November 20th, 2024.