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Tap water quality report

Jamestown, RI

EPA monitoring detected 21 contaminants across the 1 water supplier serving Jamestown. 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
3,348
people served
21
contaminants found
Rhode Island rankings Lead in Rhode Island PFAS in Rhode Island

What was found in Jamestown'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
728 µg/L 7.3%
of the EPA limit 10000 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Nitrate
560 µg/L 5.6%
of the EPA limit 10000 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Chlorite
244 µg/L 24%
of the EPA limit 1000 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Copper
130.9 µg/L 10%
of the EPA limit 1300 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
TTHM
70.426 µg/L 88%
of the EPA limit 80 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Chloroform
45.61 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
37.23 µg/L 62%
of the EPA limit 60 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Dichloroacetic Acid
17.865 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Barium
14.3 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Bromodichloromethane
13.155 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Trichloroacetic Acid
12.115 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.695 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Lead
3.4 µg/L 23%
of the EPA limit 15 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Dibromochloromethane
3.075 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Chromium
3 µg/L 3%
of the EPA limit 100 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Selenium
3 µg/L 6%
of the EPA limit 50 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2019
1/1 SYR4
Lasso
0.1000 µg/L 5%
of the EPA limit 2 µg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2017
1/1 SYR4
Pfba
0.0120 µg/L
No EPA limit set
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 people · 2023
1/1 UCMR-5
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
Main supplier: JAMESTOWN WATER DEPARTMENT · 3,348 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 Jamestown

SupplierPopulation served
JAMESTOWN WATER DEPARTMENT 3,348

Frequently asked questions about Jamestown tap water

Is Jamestown tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Jamestown. 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 Jamestown?

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

What contaminants are in Jamestown's water?

The contaminants EPA monitoring detected in Jamestown include Nitrate-Nitrite, Nitrate, Chlorite, Fluoride, Copper. 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.