Is Dartmouth Water Division Tap Water Safe? Quality Report

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

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	2021-10-01 → 2021-12-31
MCL	Health-based	Archived	2021-07-01 → 2021-09-30
MCL	Health-based	Archived	2021-04-01 → 2021-06-30
MCL	Health-based	Archived	2020-07-01 → 2020-09-30
MCL	Health-based	Archived	2020-04-01 → 2020-06-30
TT	Health-based	Resolved	2019-12-05
TT	Health-based	Resolved	2019-12-05
MCL	Health-based	Archived	2019-07-01 → 2019-09-30
MCL	Health-based	Archived	2017-10-01 → 2017-12-31
MCL	Health-based	Archived	2017-10-01 → 2017-12-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFBS	0.0207 µg/L	2/10	2024
Pfba	0.0094 µg/L	1/10	2024
Pfhpa	0.0030 µg/L	1/10	2024
Pfhxa	0.0076 µg/L	1/10	2024
PFOA	0.0042 µg/L	1/10	2024
PFOS	0.0506 µg/L	1/10	2024
Pfpea	0.0118 µg/L	1/10	2024

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
TTHM	96.625 µg/L 121% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 111 µg/L	132/132	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	50.24 µg/L 84% of the EPA limit 60 µg/L worst single sample: 75 µg/L	127/128	SYR4	2012–2019
Bromodichloromethane	19.945 µg/L No EPA limit set worst single sample: 22.3 µg/L	112/112	SYR4	2013–2019
Chloroform	78.05 µg/L No EPA limit set worst single sample: 90.3 µg/L	112/112	SYR4	2013–2019
Dibromochloromethane	6.845 µg/L No EPA limit set worst single sample: 10.1 µg/L	112/112	SYR4	2013–2019
Trichloroacetic Acid	35.975 µg/L No EPA limit set worst single sample: 127.7 µg/L	106/108	SYR4	2013–2019
Dichloroacetic Acid	23.855 µg/L No EPA limit set worst single sample: 32.1 µg/L	94/108	SYR4	2013–2019
Nitrate	850 µg/L 8.5% of the EPA limit 10000 µg/L worst single sample: 860 µg/L	50/50	SYR4	2012–2019
Lead	0.0070 mg/L 47% of the EPA limit 0.0150 mg/L	25/25	LCR	2025
Monochloroacetic Acid	6.825 µg/L No EPA limit set worst single sample: 7.3 µg/L	20/108	SYR4	2013–2019
Bromoform	1.32 µg/L No EPA limit set worst single sample: 1.4 µg/L	9/112	SYR4	2013–2019
Dibromoacetic Acid	1.375 µg/L No EPA limit set worst single sample: 1.4 µg/L	6/108	SYR4	2013–2019
Tetrachloroethylene	0.7900 µg/L 16% of the EPA limit 5 µg/L worst single sample: 0.8000 µg/L	2/62	SYR4	2012–2019
Copper	20 µg/L 1.5% of the EPA limit 1300 µg/L	1/5	SYR4	2018–2019
Fluoride	100 µg/L 2.5% of the EPA limit 4000 µg/L	1/3	SYR4	2014–2019
Heptachlor Epoxide	6 µg/L 3000% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L	1/12	SYR4	2014–2018

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, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ANDREW LAFLEUR
Phone: 5089990742
Email: [email protected]

Frequently asked questions about Dartmouth Water Division

Is Dartmouth Water Division tap water safe to drink?

EPA monitoring detected 23 contaminants in Dartmouth Water Division'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 Dartmouth Water Division's water?

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

How many people does Dartmouth Water Division serve?

Dartmouth Water Division reports serving 24,696 people in Massachusetts, per its EPA record.

Has Dartmouth Water Division had any water quality violations?

The EPA has 31 violations on file for Dartmouth Water Division, of which 23 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.