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Tap water quality report

Stoughton, MA

EPA monitoring detected 23 contaminants across the 2 water suppliers serving Stoughton. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
29,331
people served
23
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Stoughton's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
4793 µg/L 48%
of the EPA limit 10000 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
2/2 SYR4
Fluoride
596 µg/L 15%
of the EPA limit 4000 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2017
2/2 SYR4
Barium
18.045 µg/L 0.9%
of the EPA limit 2000 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2017
Highest in the city: 46.65 µg/L — BISHOPS LANDING CONDOMINIUMS · 50 people · 2017
2/2 SYR4
TTHM
24.115 µg/L 30%
of the EPA limit 80 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Copper
15.85 µg/L 1.2%
of the EPA limit 1300 µg/L
Highest in the city: BISHOPS LANDING CONDOMINIUMS · 50 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
13.75 µg/L 23%
of the EPA limit 60 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Chloroform
12.595 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Nitrite
10.95 µg/L 1.1%
of the EPA limit 1000 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2017
1/2 SYR4
Bromodichloromethane
10.1 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Dichloroacetic Acid
10.08 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Trichloroacetic Acid
7.42 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Dibromochloromethane
7 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Monochloroacetic Acid
5.52 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Chromium
5.071 µg/L 5.1%
of the EPA limit 100 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2017
1/2 SYR4
Dibromoacetic Acid
2.7 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Bromoform
2.5 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2019
1/2 SYR4
Arsenic
0.6200 µg/L 6.2%
of the EPA limit 10 µg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2017
1/2 SYR4
PFOA
0.0073 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
1/2 UCMR-5
PFOS
0.0063 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
1/2 UCMR-5
Pfhxa
0.0050 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
1/2 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
Highest in the city: 0.0048 mg/L — BISHOPS LANDING CONDOMINIUMS · 50 people · 2025
2/2 LCR
Pfpea
0.0039 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
1/2 UCMR-5
PFBS
0.0032 µg/L
No EPA limit set
Main supplier: STOUGHTON WATER DEPARTMENT · 29,281 people · 2025
1/2 UCMR-5
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Stoughton

SupplierPopulation served
STOUGHTON WATER DEPARTMENT 29,281
BISHOPS LANDING CONDOMINIUMS 50

Frequently asked questions about Stoughton tap water

Is Stoughton tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Stoughton. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Stoughton?

2 public water suppliers report drinking-water monitoring for Stoughton, Massachusetts to the EPA. Each is listed above with its population served.

What contaminants are in Stoughton's water?

The contaminants EPA monitoring detected in Stoughton include Nitrate, Fluoride, Barium, TTHM, Copper. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.