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Tap water quality report

Woonsocket, RI

EPA monitoring detected 24 contaminants across the 1 water supplier serving Woonsocket. 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
45,828
people served
24
contaminants found
Rhode Island rankings Lead in Rhode Island PFAS in Rhode Island

What was found in Woonsocket'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
550 µg/L 5.5%
of the EPA limit 10000 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Fluoride
320 µg/L 8%
of the EPA limit 4000 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Nitrate-Nitrite
210 µg/L 2.1%
of the EPA limit 10000 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2013
1/1 SYR4
TTHM
67.955 µg/L 85%
of the EPA limit 80 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Barium
52.75 µg/L 2.6%
of the EPA limit 2000 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Chloroform
51.215 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Copper
48.19 µg/L 3.7%
of the EPA limit 1300 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
25.5 µg/L 43%
of the EPA limit 60 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Nitrite
20 µg/L 2%
of the EPA limit 1000 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Bromodichloromethane
19.12 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Trichloroacetic Acid
18.145 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Dichloroacetic Acid
8.43 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Dibromochloromethane
7.2 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.36 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Lead
4.095 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2017
1/1 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
1 µg/L 17%
of the EPA limit 6 µg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Bromoform
0.6950 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2019
1/1 SYR4
Pfpea
0.0075 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2023
1/1 UCMR-5
Pfba
0.0067 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2023
1/1 UCMR-5
Lead
0.0066 mg/L 44%
of the EPA limit 0.0150 mg/L
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2025
1/1 LCR
PFOA
0.0058 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2023
1/1 UCMR-5
Pfhxa
0.0050 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2023
1/1 UCMR-5
Pfhpa
0.0037 µg/L
No EPA limit set
Main supplier: WOONSOCKET WATER DIVISION · 45,828 people · 2023
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 Woonsocket

SupplierPopulation served
WOONSOCKET WATER DIVISION 45,828

Frequently asked questions about Woonsocket tap water

Is Woonsocket tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Woonsocket. 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 Woonsocket?

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

What contaminants are in Woonsocket's water?

The contaminants EPA monitoring detected in Woonsocket include Nitrate, Fluoride, Nitrate-Nitrite, TTHM, Barium. 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.