- EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
- PFOA (a PFAS): found in 7 of 14 samples, average 3.1 ppt, highest 9 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFOS (a PFAS): found in 5 of 14 samples, average 1.8 ppt, highest 7 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFHxA (a PFAS): found in 6 of 14 samples, average 1.6 ppt, highest 5 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFPeA (a PFAS): found in 4 of 14 samples, average 1.4 ppt, highest 6 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFBS (a PFAS): found in 4 of 14 samples, average 0.90 ppt, highest 3 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFBA (a PFAS): found in 1 of 14 samples, average 0.70 ppt, highest 10 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- PFHpA (a PFAS): found in 1 of 14 samples, average 0.20 ppt, highest 3 ppt (EPA UCMR 5 testing, May 2025–Sep 2025)
- Lead: 9 in 10 homes tested came in at or below 3.6 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2026–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Public EPA test results
Can you drink Westerly tap water? What EPA records show
EPA system ID RI1559512 · serves Westerly, RI · about 35,298 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Westerly Water Department (EPA RI1559512)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Westerly's main utility, Westerly Water Department: We found no health-standard violations in EPA's records for this system (RI1559512) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
What EPA records show for Westerly Water Department, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (RI1559512) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Westerly Water Department (SDWIS). Data as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 3.6 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2026–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Westerly Water Department use chloramine?
We didn't find chloramine in Westerly Water Department's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.