Is Attleboro, MA Tap Water Safe? Quality & Contaminants

What was found in Attleboro'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
Fluoride	1000 µg/L 25% of the EPA limit 4000 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Nitrate	510 µg/L 5.1% of the EPA limit 10000 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
TTHM	92.715 µg/L 116% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Chloroform	71 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	56.05 µg/L 93% of the EPA limit 60 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Barium	43.8 µg/L 2.2% of the EPA limit 2000 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Trichloroacetic Acid	41.25 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Bromodichloromethane	26.025 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Dichloroacetic Acid	21.65 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Copper	20 µg/L 1.5% of the EPA limit 1300 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Dibromochloromethane	11.675 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Nitrite	9 µg/L 0.9% of the EPA limit 1000 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2017	1/1	SYR4
Bromate	5.3 µg/L 53% of the EPA limit 10 µg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Monochloroacetic Acid	2.88 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Bromoform	2.72 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Dibromoacetic Acid	2.3 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
Monobromoacetic Acid	0.7940 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2019	1/1	SYR4
PFOS	0.0120 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2025	1/1	UCMR-5
PFOA	0.0066 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2025	1/1	UCMR-5
Pfpea	0.0044 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2025	1/1	UCMR-5
Pfhxa	0.0043 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2025	1/1	UCMR-5
PFHXS	0.0038 µg/L No EPA limit set Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2025	1/1	UCMR-5
Lead	0.0013 mg/L 8.9% of the EPA limit 0.0150 mg/L Main supplier: ATTLEBORO WATER DEPT · 46,461 people · 2026	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 Attleboro

Supplier	Population served
ATTLEBORO WATER DEPT	46,461

Frequently asked questions about Attleboro tap water

Is Attleboro tap water safe to drink?

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

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

What contaminants are in Attleboro's water?

The contaminants EPA monitoring detected in Attleboro include Fluoride, Nitrate, 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.