Johnston Municipal Water Supply (IA) Water Quality

Johnston Municipal Water Supply is a large public water system in EPA region 7 that provides tap water for the 50111 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 HAA5 (five regulated haloacetic acids) was 15.76 µg/L. The maximum reported level of Manganese was 2.33 µg/L. The maximum reported level of quinoline was 0.19 µg/L. Some (1 of 8 or 13%) of the latest water samples showed levels of quinoline that were at or above unsafe concentration levels. There were 3 contamintants found in the Johnston Municipal Water Supply water supply at levels that were above the minimum reporting level. 1 of the contaminants were above the reference level, which means they may pose a risk to human health.

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

1,1-dichloroethane (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

1,2,3-trichloropropane (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

1,3-butadiene (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.1 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.1 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.1 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.1 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

1,4-dioxane (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

1-butanol (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

8/23/2019

6 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<2 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

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

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

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

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

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

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

2-methoxyethanol (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

8/23/2019

6 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

2-propen-1-ol (Allyl Alcohol) (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

8/23/2019

6 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.5 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

4,8-dioxa-3H-perfluorononanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.002 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.002 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

alpha-hexachlorocyclohexane (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

anatoxin-a (16)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/4/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/4/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

10/20/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

10/20/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/28/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/24/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/21/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/15/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/18/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/18/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/6/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/6/2020

5 years ago

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

Contaminant Details

bromochloromethane (Halon 1011) (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.06 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.06 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.06 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.06 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

bromomethane (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

Butylated Hydroxyanisole (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

chlorate (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

140 µg/L

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

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

118 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 98 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

114 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 94 µg/L

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

100 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 80 µg/L

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

55 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 35 µg/L

6/2/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

66 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 46 µg/L

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

69.1 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 49.1 µg/L

3/31/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

61.6 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 41.6 µg/L

3/31/2015

10 years ago

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

Contaminant Details

chlorodifluoromethane (HCFC-22) (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.08 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.08 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.08 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.08 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

chloromethane (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

6/1/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

chlorpyrifos (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

chromium (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.9 µg/L

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

12/1/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.8 µg/L

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

12/1/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.6 µg/L

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

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

1.6 µg/L

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

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.9 µg/L

6/10/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

2.4 µg/L

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

6/5/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.8 µg/L

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

3/31/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.4 µg/L

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

3/31/2015

10 years ago

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

Contaminant Details

chromium-6 (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

0.65 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.62 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.64 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.61 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

1.53 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.5 µg/L

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.37 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.34 µg/L

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

1.88 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.85 µg/L

6/2/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1.57 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 1.54 µg/L

6/1/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

0.676 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.646 µg/L

3/31/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.223 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.193 µg/L

3/31/2015

10 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

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<1 µg/L

Below Reporting Level

12/1/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<1 µg/L

Below Reporting Level

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

6/10/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<1 µg/L

Below Reporting Level

6/5/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<1 µg/L

Below Reporting Level

3/31/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<1 µg/L

Below Reporting Level

3/31/2015

10 years ago

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

Contaminant Details

cylindrospermopsin (16)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

11/17/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

11/17/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

11/4/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

11/4/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

10/20/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

10/20/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

9/28/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

9/24/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

9/21/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

9/15/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

8/18/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

8/18/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

8/6/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

8/6/2020

5 years ago

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

Contaminant Details

dimethipin (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

ethoprop (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

Germanium (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

HAA5 (five regulated haloacetic acids) (16)

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

10.9 µg/L

Meets Reporting Threshold

5/29/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

7.63 µg/L

Meets Reporting Threshold

5/29/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

7.52 µg/L

Meets Reporting Threshold

5/29/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

6.3 µg/L

Meets Reporting Threshold

5/29/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

8.99 µg/L

Meets Reporting Threshold

2/4/2020

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

6.15 µg/L

Meets Reporting Threshold

2/4/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

5.25 µg/L

Meets Reporting Threshold

2/4/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

4.94 µg/L

Meets Reporting Threshold

2/4/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

13.74 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

9 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

9 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

8.91 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

15.76 µg/L

Meets Reporting Threshold

10/29/2019

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

11.4 µg/L

Meets Reporting Threshold

10/29/2019

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

9.7 µg/L

Meets Reporting Threshold

10/29/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

8.6 µg/L

Meets Reporting Threshold

10/29/2019

5 years ago

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

Contaminant Details

HAA6Br (six brominated haloacetic acids) (16)

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

6.78 µg/L

5/29/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

5.41 µg/L

5/29/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

3.11 µg/L

5/29/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

1.1 µg/L

5/29/2020

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

5.79 µg/L

2/4/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

5.17 µg/L

2/4/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

3.76 µg/L

2/4/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

3.13 µg/L

2/4/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

6.1 µg/L

11/5/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

6.06 µg/L

11/5/2019

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

4.07 µg/L

11/5/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

2.78 µg/L

11/5/2019

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

6.3 µg/L

10/29/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

6.03 µg/L

10/29/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

4.07 µg/L

10/29/2019

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

3.25 µg/L

10/29/2019

5 years ago

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

Contaminant Details

HAA9 (nine haloacetic acids) (16)

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

16.28 µg/L

5/29/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

11.73 µg/L

5/29/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

10.31 µg/L

5/29/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

7.4 µg/L

5/29/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

12.26 µg/L

2/4/2020

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

10.54 µg/L

2/4/2020

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

9.02 µg/L

2/4/2020

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

7.63 µg/L

2/4/2020

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

17.47 µg/L

11/5/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

14.06 µg/L

11/5/2019

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

14 µg/L

11/5/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

11.38 µg/L

11/5/2019

5 years ago

6700 MERLE HAY ROAD

JOHNSTON DISTRIBUTION ℹ️

19.47 µg/L

10/29/2019

5 years ago

9500 WINDSOR PARKWAY

JOHNSTON DISTRIBUTION ℹ️

14.8 µg/L

10/29/2019

5 years ago

7390 NW Beaver Drive

JOHNSTON DISTRIBUTION ℹ️

14.65 µg/L

10/29/2019

5 years ago

10010 NW 62ND AVENUE

JOHNSTON DISTRIBUTION ℹ️

13.53 µg/L

10/29/2019

5 years ago

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

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

lithium (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

27 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 18 µg/L

4/14/2025

5 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

14 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 5 µg/L

4/14/2025

5 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

33 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 24 µg/L

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

20 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 11 µg/L

1/6/2025

8 months ago

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

Contaminant Details

Manganese (8)

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

0.4 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

2.33 µg/L

Meets Reporting Threshold

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

1.33 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.46 µg/L

Meets Reporting Threshold

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

0.96 µg/L

Meets Reporting Threshold

8/13/2019

6 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.4 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

molybdenum (8)

Max. Res. Time in Dist. System

Distribution System ℹ️

4.2 µg/L

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

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

3.5 µg/L

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

12/1/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

6.3 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 5.3 µg/L

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

6 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 5 µg/L

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

2.1 µg/L

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

6/10/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

2 µg/L

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

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

3.6 µg/L

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

3/31/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

3.2 µg/L

⚠️ Exceeds Reporting Level of 1 µg/L by 2.2 µg/L

3/31/2015

10 years ago

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

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

2/10/2025

7 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.006 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.006 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.006 µg/L

Below Reporting Level

2/10/2025

7 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.006 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

o-toluidine (8)

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

0.014 µg/L

⚠️ Exceeds Reporting Level of 0.007 µg/L by 0.007 µg/L

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

oxyfluorfen (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.05 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoro-3-methoxypropanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoro-4-methoxybutanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorobutanesulfonic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.09 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluorobutanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.005 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorodecanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorododecanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoroheptanesulfonic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoroheptanoic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.01 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluorohexanesulfonic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.03 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluorohexanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorononanoic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluorooctanesulfonic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluorooctanoic acid (6)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

4/3/2015

10 years ago

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

Contaminant Details

perfluoropentanesulfonic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.004 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoropentanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.003 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorotetradecanoic acid (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.008 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.008 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.008 µg/L

Below Reporting Level

2/10/2025

7 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.008 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluorotridecanoic acid (4)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

5/13/2025

4 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

2/10/2025

7 months ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.007 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

perfluoroundecanoic acid (2)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.002 µg/L

Below Reporting Level

1/6/2025

8 months ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.002 µg/L

Below Reporting Level

1/6/2025

8 months ago

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

Contaminant Details

profenofos (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

quinoline (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.19 µg/L

☠️ Exceeds Reference Level by 0.18 µg/L

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

2/4/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.02 µg/L

Below Reporting Level

8/13/2019

6 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

101 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 100.7 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

92 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 91.7 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

195 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 194.7 µg/L

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

176 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 175.7 µg/L

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

135 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 134.7 µg/L

6/10/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

138 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 137.7 µg/L

6/5/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

112 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 111.7 µg/L

3/31/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

107 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 106.7 µg/L

3/31/2015

10 years ago

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

Contaminant Details

tebuconazole (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

total microcystins (16)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/17/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/17/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/4/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

11/4/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

10/20/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

10/20/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

10/6/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

9/28/2020

4 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

9/24/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

9/21/2020

4 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

9/15/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/18/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/18/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/6/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.3 µg/L

Below Reporting Level

8/6/2020

5 years ago

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

Contaminant Details

Total Permethrin (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.04 µg/L

Below Reporting Level

8/13/2019

6 years ago

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

Contaminant Details

tribufos (8)

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

5/27/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

5/27/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

2/26/2020

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

2/4/2020

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

11/5/2019

5 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

11/5/2019

5 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

8/13/2019

6 years ago

4620 NW 62ND AVE

CITY OF JOHNSTON ℹ️

<0.07 µg/L

Below Reporting Level

8/13/2019

6 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

2 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.8 µg/L

12/1/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

1.5 µg/L

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

12/1/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

1 µg/L

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

9/28/2015

9 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

0.9 µg/L

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

9/28/2015

9 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

6/10/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

<0.2 µg/L

Below Reporting Level

6/5/2015

10 years ago

5200 MERLE HAY RD

CITY OF JOHNSTON ℹ️

2.5 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 2.3 µg/L

3/31/2015

10 years ago

Max. Res. Time in Dist. System

Distribution System ℹ️

2.1 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 1.9 µg/L

3/31/2015

10 years ago

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

Contaminant Details

Sampling Facilities

CITY OF JOHNSTON
Surface Water (SW)

5200 MERLE HAY RDEntry Point to the Distribution System (EP)

4620 NW 62ND AVEEntry Point to the Distribution System (EP)

JOHNSTON DISTRIBUTION
Surface Water (SW)

7390 NW Beaver DriveDistribution System (DS)

6700 MERLE HAY ROADDistribution System (DS)

9500 WINDSOR PARKWAYDistribution System (DS)

10010 NW 62ND AVENUEDistribution System (DS)

Distribution System
Surface Water (SW)

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

FAQ

Is Johnston Municipal Water Supply tap water safe to drink?

When was Johnston Municipal Water Supply last tested for water contamination?

The latest water samples were taken on May 13th, 2025.

Contaminants

1,1-dichloroethane (4)

1,2,3-trichloropropane (4)

1,3-butadiene (4)

1,4-dioxane (4)

1-butanol (8)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (2)

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

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

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

2-methoxyethanol (8)

2-propen-1-ol (Allyl Alcohol) (8)

4,8-dioxa-3H-perfluorononanoic acid (2)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (2)

alpha-hexachlorocyclohexane (8)

anatoxin-a (16)

bromochloromethane (Halon 1011) (4)

bromomethane (4)

Butylated Hydroxyanisole (8)

chlorate (8)

chlorodifluoromethane (HCFC-22) (4)

chloromethane (4)

chlorpyrifos (8)

chromium (8)

chromium-6 (8)

cobalt (8)

cylindrospermopsin (16)

dimethipin (8)

ethoprop (8)

Germanium (8)

HAA5 (five regulated haloacetic acids) (16)

HAA6Br (six brominated haloacetic acids) (16)

HAA9 (nine haloacetic acids) (16)

hexafluoropropylene oxide dimer acid (GenX) (2)

lithium (4)

Manganese (8)

molybdenum (8)

N-ethyl perfluorooctanesulfonamidoacetic acid (4)

N-methyl perfluorooctanesulfonamidoacetic acid (4)

nonafluoro-3,6-dioxaheptanoic acid (2)

o-toluidine (8)

oxyfluorfen (8)

perfluoro(2-ethoxyethane)sulfonic acid (2)

perfluoro-3-methoxypropanoic acid (2)

perfluoro-4-methoxybutanoic acid (2)

perfluorobutanesulfonic acid (6)

perfluorobutanoic acid (2)

perfluorodecanoic acid (2)

perfluorododecanoic acid (2)

perfluoroheptanesulfonic acid (2)

perfluoroheptanoic acid (6)

perfluorohexanesulfonic acid (6)

perfluorohexanoic acid (2)

perfluorononanoic acid (6)

perfluorooctanesulfonic acid (6)

perfluorooctanoic acid (6)

perfluoropentanesulfonic acid (2)

perfluoropentanoic acid (2)

perfluorotetradecanoic acid (4)

perfluorotridecanoic acid (4)

perfluoroundecanoic acid (2)

profenofos (8)

quinoline (8)

strontium (8)

tebuconazole (8)

total microcystins (16)

Total Permethrin (8)

tribufos (8)

vanadium (8)

Sampling Facilities

CITY OF JOHNSTON Surface Water (SW)

JOHNSTON DISTRIBUTION Surface Water (SW)

Distribution System Surface Water (SW)

FAQ

Is Johnston Municipal Water Supply tap water safe to drink?

When was Johnston Municipal Water Supply last tested for water contamination?

CITY OF JOHNSTON
Surface Water (SW)

JOHNSTON DISTRIBUTION
Surface Water (SW)

Distribution System
Surface Water (SW)