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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 level at the main supplier 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 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
850 µg/L 8.5%
of the EPA limit 10000 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
TTHM
96.625 µg/L 121%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Chloroform
78.05 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
50.24 µg/L 84%
of the EPA limit 60 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Trichloroacetic Acid
35.975 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Dichloroacetic Acid
23.855 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Bromodichloromethane
19.945 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Dibromochloromethane
6.845 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Monochloroacetic Acid
6.825 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Heptachlor Epoxide
6 µg/L 3000%
of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2018
1/1 SYR4
Dibromoacetic Acid
1.375 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Bromoform
1.32 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
Tetrachloroethylene
0.7900 µg/L 16%
of the EPA limit 5 µg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2019
1/1 SYR4
PFOS
0.0506 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
PFBS
0.0207 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
Pfpea
0.0118 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
Pfba
0.0094 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
Pfhxa
0.0076 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2025
1/1 LCR
PFOA
0.0042 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
1/1 UCMR-5
Pfhpa
0.0030 µg/L
No EPA limit set
Main supplier: DARTMOUTH WATER DIVISION · 24,696 people · 2024
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 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 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, Fluoride, TTHM, Chloroform, Total Haloacetic Acids (HAA5). 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.