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Tap water quality report

Dartmouth, MA

EPA monitoring detected 23 contaminants across the 1 water supplier serving Dartmouth. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
24,696
people served
23
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Dartmouth's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
860 µg/L 8.6%
of the EPA limit 10000 µg/L
 1/1 SYR4
Trichloroacetic Acid
127.7 µg/L
No EPA limit set
 1/1 SYR4
TTHM
111 µg/L 139%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
 1/1 SYR4
Chloroform
90.3 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
75 µg/L 125%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
Dichloroacetic Acid
32.1 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
22.3 µg/L
No EPA limit set
 1/1 SYR4
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
 1/1 SYR4
Dibromochloromethane
10.1 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
7.3 µg/L
No EPA limit set
 1/1 SYR4
Heptachlor Epoxide
6 µg/L 3000%
of the EPA limit, in the worst sample — 0.2000 µg/L
 1/1 SYR4
Bromoform
1.4 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
1.4 µg/L
No EPA limit set
 1/1 SYR4
Tetrachloroethylene
0.8000 µg/L 16%
of the EPA limit 5 µg/L
 1/1 SYR4
PFOS
0.0506 µg/L
No EPA limit set
 1/1 UCMR-5
PFBS
0.0207 µg/L
No EPA limit set
 1/1 UCMR-5
Lead
0.0162 mg/L 108%
above the EPA limit of 0.0150 mg/L
 1/1 LCR
Pfpea
0.0118 µg/L
No EPA limit set
 1/1 UCMR-5
Pfba
0.0094 µg/L
No EPA limit set
 1/1 UCMR-5
Pfhxa
0.0076 µg/L
No EPA limit set
 1/1 UCMR-5
PFOA
0.0042 µg/L
No EPA limit set
 1/1 UCMR-5
Pfhpa
0.0030 µg/L
No EPA limit set
 1/1 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 single worst sample on record — 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 Dartmouth

SupplierPopulation served
DARTMOUTH WATER DIVISION 24,696

Frequently asked questions about Dartmouth tap water

Is Dartmouth tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Dartmouth. 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 Dartmouth?

1 public water supplier report drinking-water monitoring for Dartmouth, Massachusetts to the EPA. Each is listed above with its population served.

What contaminants are in Dartmouth's water?

The contaminants EPA monitoring detected in Dartmouth include Nitrate, Trichloroacetic Acid, TTHM, Fluoride, Chloroform. The full list, with the highest level found 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.