Is Somerset, MA Tap Water Safe? Quality & Contaminants

What was found in Somerset'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	2451.5 µg/L 25% of the EPA limit 10000 µg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Fluoride	1040 µg/L 26% of the EPA limit 4000 µg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
TTHM	97.115 µg/L 121% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Chloroform	78.56 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	55.205 µg/L 92% of the EPA limit 60 µg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Trichloroacetic Acid	35.39 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Dichloroacetic Acid	19.45 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Bromodichloromethane	19.3 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Chromium	12 µg/L 12% of the EPA limit 100 µg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Dibromochloromethane	4.029 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Monochloroacetic Acid	3.088 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Monobromoacetic Acid	1.09 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Bromoform	0.5600 µg/L No EPA limit set Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2019	1/1	SYR4
Lead	0.0100 mg/L 67% of the EPA limit 0.0150 mg/L Main supplier: SOMERSET WATER DEPARTMENT · 18,303 people · 2025	1/1	LCR

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 Somerset

Supplier	Population served
SOMERSET WATER DEPARTMENT	18,303

Frequently asked questions about Somerset tap water

Is Somerset tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Somerset. 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 Somerset?

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

What contaminants are in Somerset's water?

The contaminants EPA monitoring detected in Somerset 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.