Is Stoughton Water Department Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Norfolk

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2015-09-01 → 2015-09-30
MCL	Health-based	Archived	2015-07-01 → 2015-07-31
MCL	Health-based	Archived	2015-06-01 → 2015-06-30
MCL	Health-based	Archived	2005-04-01 → 2005-06-30
TT	Health-based	Resolved	1996-01-01
TT	Health-based	Resolved	1996-01-01
MCL	Health-based	Resolved	1995-08-01 → 1995-08-31
MCL	Health-based	Archived	1991-11-01 → 1991-11-30
MR	Monitoring	Archived	2025-01-01 → 2025-03-31
Other	Monitoring	Resolved	2018-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFOA	0.0073 µg/L	4/5	2025
PFOS	0.0063 µg/L	3/5	2025
PFBS	0.0032 µg/L	2/5	2025
Pfhxa	0.0050 µg/L	2/5	2025
Pfpea	0.0039 µg/L	2/5	2025

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	4793 µg/L 48% of the EPA limit 10000 µg/L worst single sample: 4920 µg/L	148/150	SYR4	2012–2019
TTHM	24.115 µg/L 30% of the EPA limit 80 µg/L worst single sample: 38 µg/L	54/56	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	13.75 µg/L 23% of the EPA limit 60 µg/L worst single sample: 25 µg/L	36/52	SYR4	2012–2019
Chloroform	12.595 µg/L No EPA limit set worst single sample: 23.7 µg/L	32/32	SYR4	2013–2019
Bromodichloromethane	10.1 µg/L No EPA limit set worst single sample: 12.8 µg/L	31/32	SYR4	2013–2019
Dibromochloromethane	7 µg/L No EPA limit set worst single sample: 7.5 µg/L	27/32	SYR4	2013–2019
Dichloroacetic Acid	10.08 µg/L No EPA limit set worst single sample: 10.7 µg/L	26/32	SYR4	2013–2019
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	23/23	LCR	2025
Trichloroacetic Acid	7.42 µg/L No EPA limit set worst single sample: 11.1 µg/L	17/32	SYR4	2013–2019
Bromoform	2.5 µg/L No EPA limit set	16/32	SYR4	2013–2019
Dibromoacetic Acid	2.7 µg/L No EPA limit set worst single sample: 3.3 µg/L	11/32	SYR4	2013–2019
Fluoride	596 µg/L 15% of the EPA limit 4000 µg/L worst single sample: 610 µg/L	5/12	SYR4	2014–2017
Barium	18.045 µg/L 0.9% of the EPA limit 2000 µg/L worst single sample: 18.3 µg/L	4/12	SYR4	2014–2017
Chromium	5.071 µg/L 5.1% of the EPA limit 100 µg/L worst single sample: 5.8 µg/L	4/12	SYR4	2014–2017
Monochloroacetic Acid	5.52 µg/L No EPA limit set worst single sample: 5.7 µg/L	4/32	SYR4	2013–2019
Nitrite	10.95 µg/L 1.1% of the EPA limit 1000 µg/L worst single sample: 11 µg/L	2/12	SYR4	2014–2017
Arsenic	0.6200 µg/L 6.2% of the EPA limit 10 µg/L	1/12	SYR4	2014–2017

80 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: KEITH NASTASIA
Phone: 7813442112
Email: [email protected]

Frequently asked questions about Stoughton Water Department

Is Stoughton Water Department tap water safe to drink?

EPA monitoring detected 22 contaminants in Stoughton Water Department's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Stoughton Water Department's water?

EPA monitoring detected Nitrate, TTHM, Total Haloacetic Acids (HAA5), Chloroform, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Stoughton Water Department serve?

Stoughton Water Department reports serving 29,281 people in Massachusetts, per its EPA record.

Has Stoughton Water Department had any water quality violations?

The EPA has 17 violations on file for Stoughton Water Department, of which 8 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.