Walnut Creek SUD (TX) Water Quality

Walnut Creek SUD is a large public water system in EPA region 6 that provides tap water for the 76023, 76082, 76487 zip codes. It has 3 facilities where the water supply was tested for 68 chemical contaminants that impact tap water quality and human health.

The maximum reported level of 2-methoxyethanol was 0.6 µg/L. The maximum reported level of HAA5 (five regulated haloacetic acids) was 30.7 µg/L. The maximum reported level of Manganese was 0.43 µg/L. There were 3 contamintants found in the Walnut Creek SUD water supply at levels that were above the minimum reporting level.

Table of Contents
Contaminants
Facilities
FAQ

Contaminants

Jump To Contaminant
1,1-dichloroethane (4)
1,2,3-trichloropropane (4)
1,3-butadiene (4)
1,4-dioxane (4)
1-butanol (4)
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (4)
1H,1H,2H,2H-perfluorodecane sulfonic acid (4)
1H,1H,2H,2H-perfluorohexane sulfonic acid (4)
1H,1H,2H,2H-perfluorooctane sulfonic acid (4)
2-methoxyethanol (4)
2-propen-1-ol (Allyl Alcohol) (4)
4,8-dioxa-3H-perfluorononanoic acid (4)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (4)
alpha-hexachlorocyclohexane (4)
anatoxin-a (7)
bromochloromethane (Halon 1011) (4)
bromomethane (4)
Butylated Hydroxyanisole (3)
chlorate (8)
chlorodifluoromethane (HCFC-22) (4)
chloromethane (4)
chlorpyrifos (4)
chromium (8)
chromium-6 (8)
cobalt (8)
cylindrospermopsin (7)
dimethipin (4)
ethoprop (4)
Germanium (4)
HAA5 (five regulated haloacetic acids) (16)
HAA6Br (six brominated haloacetic acids) (16)
HAA9 (nine haloacetic acids) (16)
hexafluoropropylene oxide dimer acid (GenX) (4)
lithium (4)
Manganese (4)
molybdenum (8)
N-ethyl perfluorooctanesulfonamidoacetic acid (4)
N-methyl perfluorooctanesulfonamidoacetic acid (4)
nonafluoro-3,6-dioxaheptanoic acid (4)
o-toluidine (3)
oxyfluorfen (4)
perfluoro(2-ethoxyethane)sulfonic acid (4)
perfluoro-3-methoxypropanoic acid (4)
perfluoro-4-methoxybutanoic acid (4)
perfluorobutanesulfonic acid (8)
perfluorobutanoic acid (4)
perfluorodecanoic acid (4)
perfluorododecanoic acid (4)
perfluoroheptanesulfonic acid (4)
perfluoroheptanoic acid (8)
perfluorohexanesulfonic acid (8)
perfluorohexanoic acid (4)
perfluorononanoic acid (8)
perfluorooctanesulfonic acid (8)
perfluorooctanoic acid (8)
perfluoropentanesulfonic acid (4)
perfluoropentanoic acid (4)
perfluorotetradecanoic acid (4)
perfluorotridecanoic acid (4)
perfluoroundecanoic acid (4)
profenofos (4)
quinoline (3)
strontium (8)
tebuconazole (4)
total microcystins (7)
Total Permethrin (4)
tribufos (4)
vanadium (8)

1,1-dichloroethane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

1,2,3-trichloropropane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

1,3-butadiene (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.1 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.1 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.1 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.1 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

1,4-dioxane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

1-butanol (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<2 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<2 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<2 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<2 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

1H,1H,2H,2H-perfluorodecane sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

1H,1H,2H,2H-perfluorohexane sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

1H,1H,2H,2H-perfluorooctane sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

2-methoxyethanol (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.6 µg/L

Meets Reporting Threshold

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

2-propen-1-ol (Allyl Alcohol) (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.5 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.5 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.5 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.5 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

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

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

alpha-hexachlorocyclohexane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

anatoxin-a (7)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

12/14/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/11/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

10/26/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

9/29/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

9/14/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

8/24/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

8/10/2020

5 years ago

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

Contaminant Details

bromochloromethane (Halon 1011) (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.06 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.06 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.06 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.06 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

bromomethane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

Butylated Hydroxyanisole (3)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

chlorate (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

<20 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<20 µg/L

Below Reporting Level

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<20 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<20 µg/L

Below Reporting Level

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<20 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<20 µg/L

Below Reporting Level

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<20 µg/L

Below Reporting Level

11/25/2013

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<20 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

chlorodifluoromethane (HCFC-22) (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.08 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.08 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.08 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.08 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

chloromethane (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

chlorpyrifos (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

chromium (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

0.253 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.053 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

11/25/2013

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

chromium-6 (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

0.0574 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.0274 µg/L

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.0334 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.0034 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.0472 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.0172 µg/L

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.0416 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.0116 µg/L

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.031 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.001 µg/L

3/20/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.03 µg/L

Below Reporting Level

3/20/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.03 µg/L

Below Reporting Level

11/25/2013

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

cobalt (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<1 µg/L

Below Reporting Level

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<1 µg/L

Below Reporting Level

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<1 µg/L

Below Reporting Level

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

11/25/2013

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<1 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

cylindrospermopsin (7)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

12/14/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

11/11/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

10/26/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

9/29/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

9/14/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

8/24/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

8/10/2020

5 years ago

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

Contaminant Details

dimethipin (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

ethoprop (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

Germanium (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

HAA5 (five regulated haloacetic acids) (16)

2657 Higland Road HAA5

Distribution System ℹ️

30.7 µg/L

⚠️ Exceeds 50% of Reference Level

4/23/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

28.6 µg/L

Meets Reporting Threshold

4/23/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

28.55 µg/L

Meets Reporting Threshold

4/23/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

23.4 µg/L

Meets Reporting Threshold

4/23/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

25.45 µg/L

Meets Reporting Threshold

1/22/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

20.77 µg/L

Meets Reporting Threshold

1/22/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

20.32 µg/L

Meets Reporting Threshold

1/22/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

18.28 µg/L

Meets Reporting Threshold

1/22/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

26.9 µg/L

Meets Reporting Threshold

10/16/2018

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

24.5 µg/L

Meets Reporting Threshold

10/16/2018

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

22.3 µg/L

Meets Reporting Threshold

10/16/2018

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

19.8 µg/L

Meets Reporting Threshold

10/16/2018

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

27.59 µg/L

Meets Reporting Threshold

7/23/2018

7 years ago

2657 Higland Road HAA5

Distribution System ℹ️

27.14 µg/L

Meets Reporting Threshold

7/23/2018

7 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

26.43 µg/L

Meets Reporting Threshold

7/23/2018

7 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

21.36 µg/L

Meets Reporting Threshold

7/23/2018

7 years ago

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

Contaminant Details

HAA6Br (six brominated haloacetic acids) (16)

2657 Higland Road HAA5

Distribution System ℹ️

29.2 µg/L

4/23/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

28.65 µg/L

4/23/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

28.2 µg/L

4/23/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

26.3 µg/L

4/23/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

24.35 µg/L

1/22/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

22.87 µg/L

1/22/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

22.62 µg/L

1/22/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

21.38 µg/L

1/22/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

30.8 µg/L

10/16/2018

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

29.2 µg/L

10/16/2018

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

29.1 µg/L

10/16/2018

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

27.5 µg/L

10/16/2018

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

30.83 µg/L

7/23/2018

7 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

30.69 µg/L

7/23/2018

7 years ago

2657 Higland Road HAA5

Distribution System ℹ️

29.64 µg/L

7/23/2018

7 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

25.36 µg/L

7/23/2018

7 years ago

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

Contaminant Details

HAA9 (nine haloacetic acids) (16)

2657 Higland Road HAA5

Distribution System ℹ️

53.9 µg/L

4/23/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

51.65 µg/L

4/23/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

51.1 µg/L

4/23/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

44.6 µg/L

4/23/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

44.95 µg/L

1/22/2019

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

39.27 µg/L

1/22/2019

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

38.72 µg/L

1/22/2019

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

35.68 µg/L

1/22/2019

6 years ago

2657 Higland Road HAA5

Distribution System ℹ️

51.8 µg/L

10/16/2018

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

47.8 µg/L

10/16/2018

6 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

45.5 µg/L

10/16/2018

6 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

41.5 µg/L

10/16/2018

6 years ago

NewHope Road and Knob Hill Road HAA5

Distribution System ℹ️

50.69 µg/L

7/23/2018

7 years ago

Big Salty and Epson Ct.HAA5

Distribution System ℹ️

49.53 µg/L

7/23/2018

7 years ago

2657 Higland Road HAA5

Distribution System ℹ️

49.34 µg/L

7/23/2018

7 years ago

CR 3540 and FM 2123 HAA5

Distribution System ℹ️

40.06 µg/L

7/23/2018

7 years ago

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

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

lithium (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<9 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<9 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<9 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<9 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

Manganese (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.43 µg/L

Meets Reporting Threshold

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

molybdenum (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

1.12 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.12 µg/L

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.04 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.04 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1.03 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.03 µg/L

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.01 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0.01 µg/L

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0 µg/L

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 0 µg/L

11/25/2013

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.005 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.006 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.006 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.006 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.006 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

o-toluidine (3)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

oxyfluorfen (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.05 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.05 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.05 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.05 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoro-3-methoxypropanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoro-4-methoxybutanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluorobutanesulfonic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.09 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluorobutanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

0.0067 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0017 µg/L

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.005 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0 µg/L

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.0073 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0023 µg/L

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.0059 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0009 µg/L

2/6/2023

2 years ago

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

Contaminant Details

perfluorodecanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluorododecanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoroheptanesulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoroheptanoic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.01 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluorohexanesulfonic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluorohexanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluorononanoic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluorooctanesulfonic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluorooctanoic acid (8)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

2/6/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

11/25/2013

11 years ago

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

Contaminant Details

perfluoropentanesulfonic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.004 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoropentanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.003 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluorotetradecanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.008 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.008 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.008 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.008 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluorotridecanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.007 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

perfluoroundecanoic acid (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

11/6/2023

22 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

8/7/2023

25 months ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

5/1/2023

2 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.002 µg/L

Below Reporting Level

2/6/2023

2 years ago

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

Contaminant Details

profenofos (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

quinoline (3)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

strontium (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

291 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 290.7 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

287 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 286.7 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

317 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 316.7 µg/L

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

313 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 312.7 µg/L

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

291 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 290.7 µg/L

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

290 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 289.7 µg/L

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

281 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 280.7 µg/L

11/25/2013

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

269 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 268.7 µg/L

11/25/2013

11 years ago

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

Contaminant Details

tebuconazole (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

total microcystins (7)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

12/14/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

11/11/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

10/26/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

9/29/2020

4 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

9/14/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

8/24/2020

5 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.3 µg/L

Below Reporting Level

8/10/2020

5 years ago

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

Contaminant Details

Total Permethrin (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

tribufos (4)

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

4/23/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/22/2019

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

10/16/2018

6 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/23/2018

7 years ago

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

Contaminant Details

vanadium (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

1.26 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.06 µg/L

8/28/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1 µg/L

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

8/28/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.1 µg/L

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

5/29/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1.08 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.88 µg/L

5/29/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.749 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.549 µg/L

2/26/2014

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

0.736 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.536 µg/L

2/26/2014

11 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.16 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.96 µg/L

11/25/2013

11 years ago

Bridgeport Plant

Walnut Creek WTP ℹ️

1.16 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.96 µg/L

11/25/2013

11 years ago

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

Contaminant Details

Sampling Facilities

Walnut Creek WTP
Surface Water (SW)

Bridgeport PlantEntry Point to the Distribution System (EP)

Distribution System
Surface Water (SW)

Big Salty and Epson Ct.HAA5Distribution System (DS)

2657 Higland Road HAA5Distribution System (DS)

NewHope Road and Knob Hill Road HAA5Distribution System (DS)

CR 3540 and FM 2123 HAA5Distribution System (DS)

Distribution System
Surface Water (SW)

Max. Res. Time in Dist. SystemMaximum Residence Time (MR)

FAQ

Is Walnut Creek SUD tap water safe to drink?

When was Walnut Creek SUD last tested for water contamination?

The latest water samples were taken on November 6th, 2023.

Contaminants

1,1-dichloroethane (4)

1,2,3-trichloropropane (4)

1,3-butadiene (4)

1,4-dioxane (4)

1-butanol (4)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (4)

1H,1H,2H,2H-perfluorodecane sulfonic acid (4)

1H,1H,2H,2H-perfluorohexane sulfonic acid (4)

1H,1H,2H,2H-perfluorooctane sulfonic acid (4)

2-methoxyethanol (4)

2-propen-1-ol (Allyl Alcohol) (4)

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

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (4)

alpha-hexachlorocyclohexane (4)

anatoxin-a (7)

bromochloromethane (Halon 1011) (4)

bromomethane (4)

Butylated Hydroxyanisole (3)

chlorate (8)

chlorodifluoromethane (HCFC-22) (4)

chloromethane (4)

chlorpyrifos (4)

chromium (8)

chromium-6 (8)

cobalt (8)

cylindrospermopsin (7)

dimethipin (4)

ethoprop (4)

Germanium (4)

HAA5 (five regulated haloacetic acids) (16)

HAA6Br (six brominated haloacetic acids) (16)

HAA9 (nine haloacetic acids) (16)

hexafluoropropylene oxide dimer acid (GenX) (4)

lithium (4)

Manganese (4)

molybdenum (8)

N-ethyl perfluorooctanesulfonamidoacetic acid (4)

N-methyl perfluorooctanesulfonamidoacetic acid (4)

nonafluoro-3,6-dioxaheptanoic acid (4)

o-toluidine (3)

oxyfluorfen (4)

perfluoro(2-ethoxyethane)sulfonic acid (4)

perfluoro-3-methoxypropanoic acid (4)

perfluoro-4-methoxybutanoic acid (4)

perfluorobutanesulfonic acid (8)

perfluorobutanoic acid (4)

perfluorodecanoic acid (4)

perfluorododecanoic acid (4)

perfluoroheptanesulfonic acid (4)

perfluoroheptanoic acid (8)

perfluorohexanesulfonic acid (8)

perfluorohexanoic acid (4)

perfluorononanoic acid (8)

perfluorooctanesulfonic acid (8)

perfluorooctanoic acid (8)

perfluoropentanesulfonic acid (4)

perfluoropentanoic acid (4)

perfluorotetradecanoic acid (4)

perfluorotridecanoic acid (4)

perfluoroundecanoic acid (4)

profenofos (4)

quinoline (3)

strontium (8)

tebuconazole (4)

total microcystins (7)

Total Permethrin (4)

tribufos (4)

vanadium (8)

Sampling Facilities

Walnut Creek WTP Surface Water (SW)

Distribution System Surface Water (SW)

Distribution System Surface Water (SW)

FAQ

Is Walnut Creek SUD tap water safe to drink?

When was Walnut Creek SUD last tested for water contamination?

Walnut Creek WTP
Surface Water (SW)

Distribution System
Surface Water (SW)

Distribution System
Surface Water (SW)