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Tap water quality report

Warren, RI

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Warren. 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.

2
water suppliers
49,225
people served
18
contaminants found
Rhode Island rankings Lead in Rhode Island PFAS in Rhode Island

What was found in Warren'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-Nitrite
6472 µg/L 65%
of the EPA limit 10000 µg/L
Highest in the city: TOUISSET POINT WATER TRUST · 225 people · 2019
1/2 SYR4
Nitrate
5520 µg/L 55%
of the EPA limit 10000 µg/L
Highest in the city: TOUISSET POINT WATER TRUST · 225 people · 2019
1/2 SYR4
Copper
38.2 µg/L 2.9%
of the EPA limit 1300 µg/L
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
Highest in the city: 127.72 µg/L — TOUISSET POINT WATER TRUST · 225 people · 2017
2/2 SYR4
TTHM
94.535 µg/L 118%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Chloroform
85.5 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
28.41 µg/L 47%
of the EPA limit 60 µg/L
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Dichloroacetic Acid
22.72 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Barium
12.75 µg/L 0.6%
of the EPA limit 2000 µg/L
Highest in the city: TOUISSET POINT WATER TRUST · 225 people · 2018
1/2 SYR4
Lead
10.84 µg/L 72%
of the EPA limit 15 µg/L
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
2/2 SYR4
Bromodichloromethane
8.446 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Chromium
5.2 µg/L 5.2%
of the EPA limit 100 µg/L
Highest in the city: TOUISSET POINT WATER TRUST · 225 people · 2018
1/2 SYR4
Trichloroacetic Acid
4.07 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Monochloroacetic Acid
3.395 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Dibromochloromethane
1.772 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
Highest in the city: TOUISSET POINT WATER TRUST · 225 people · 2018
1/2 SYR4
Monobromoacetic Acid
0.8465 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Dibromoacetic Acid
0.4800 µg/L
No EPA limit set
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2019
1/2 SYR4
Lead
0.0019 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: BRISTOL COUNTY WATER AUTHORITY · 49,000 people · 2025
Highest in the city: 0.0025 mg/L — TOUISSET POINT WATER TRUST · 225 people · 2013
2/2 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 Warren

SupplierPopulation served
BRISTOL COUNTY WATER AUTHORITY 49,000
TOUISSET POINT WATER TRUST 225

Frequently asked questions about Warren tap water

Is Warren tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Warren. 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 Warren?

2 public water suppliers report drinking-water monitoring for Warren, Rhode Island to the EPA. Each is listed above with its population served.

What contaminants are in Warren's water?

The contaminants EPA monitoring detected in Warren include Nitrate-Nitrite, Nitrate, Copper, TTHM, Chloroform. 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.