What was found in Westerly'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 |
|---|---|---|---|
| Nitrate | 3022.5 µg/L 30% of the EPA limit 10000 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 2664 µg/L 27% of the EPA limit 10000 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2019 | 1/1 | SYR4 |
| Fluoride | 178.5 µg/L 4.5% of the EPA limit 4000 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2017 | 1/1 | SYR4 |
| Barium | 80.2 µg/L 4% of the EPA limit 2000 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2017 | 1/1 | SYR4 |
| TTHM | 35.895 µg/L 45% of the EPA limit 80 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.145 µg/L 32% of the EPA limit 60 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.12 pCi/L 21% of the EPA limit 15 pCi/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2014 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.9200 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2017 | 1/1 | SYR4 |
| Beryllium, Total | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2017 | 1/1 | SYR4 |
| Pfba | 0.0100 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0090 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| PFOS | 0.0070 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0060 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0051 mg/L 34% of the EPA limit 0.0150 mg/L Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | LCR |
| Pfhxa | 0.0050 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
| Pfhpa | 0.0030 µg/L No EPA limit set Main supplier: WESTERLY WATER DEPARTMENT · 35,298 people · 2025 | 1/1 | UCMR-5 |
Water suppliers serving Westerly
| Supplier | Population served |
|---|---|
| WESTERLY WATER DEPARTMENT | 35,298 |
Frequently asked questions about Westerly tap water
Is Westerly tap water safe to drink?
EPA testing detected 17 contaminants in the water serving Westerly. 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 Westerly?
1 public water supplier report drinking-water monitoring for Westerly, Rhode Island to the EPA. Each is listed above with its population served.
What contaminants are in Westerly's water?
The contaminants EPA monitoring detected in Westerly include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.