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Tap water quality report

Narragansett, RI

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Narragansett. 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
12,642
people served
17
contaminants found
Rhode Island rankings Lead in Rhode Island PFAS in Rhode Island

What was found in Narragansett'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
Copper
839 µg/L 65%
of the EPA limit 1300 µg/L
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2018
2/2 SYR4
TTHM
106.4 µg/L 133%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
2/2 SYR4
Chloroform
82.4 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
39.045 µg/L 65%
of the EPA limit 60 µg/L
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
Highest in the city: 43.745 µg/L — NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
2/2 SYR4
Trichloroacetic Acid
29.4 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
Highest in the city: 36.15 µg/L — NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
2/2 SYR4
Lead
24.8 µg/L 165%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2018
2/2 SYR4
Bromodichloromethane
20.25 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
2/2 SYR4
Dichloroacetic Acid
10.1 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
Highest in the city: 12.35 µg/L — NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
2/2 SYR4
Dibromochloromethane
3.645 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
Highest in the city: 8.22 µg/L — NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
2/2 SYR4
Bromoform
6.5 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
1/2 SYR4
Monochloroacetic Acid
1.9 µg/L
No EPA limit set
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2019
Highest in the city: 3.29 µg/L — NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
2/2 SYR4
Dibromoacetic Acid
2.2 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2019
1/2 SYR4
PFBS
0.0054 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2023
1/2 UCMR-5
PFOA
0.0043 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2023
1/2 UCMR-5
Lead
0.0041 mg/L 27%
of the EPA limit 0.0150 mg/L
Main supplier: NARRAGANSETT WATER SYSTEM-POINT JUDITH · 8,210 people · 2024
2/2 LCR
PFOS
0.0040 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2023
1/2 UCMR-5
Pfhxa
0.0035 µg/L
No EPA limit set
Highest in the city: NARRAGANSETT WATER DEPT-NORTH END · 4,432 people · 2023
1/2 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 Narragansett

SupplierPopulation served
NARRAGANSETT WATER SYSTEM-POINT JUDITH 8,210
NARRAGANSETT WATER DEPT-NORTH END 4,432

Frequently asked questions about Narragansett tap water

Is Narragansett tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Narragansett. 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 Narragansett?

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

What contaminants are in Narragansett's water?

The contaminants EPA monitoring detected in Narragansett include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.