- EPA's UCMR 5 testing looked for 30 contaminants here and found 4.
- Lithium: found in 2 of 4 samples, average 5.75 µg/L, highest 11.8 µg/L (EPA UCMR 5 testing, Feb 2023–Aug 2023)
Public EPA test results
What EPA records show for Aquarion-Plainville Regional
EPA system ID CT1100011 · serves Bristol, CT · about 18,231 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
Aquarion-Plainville Regional (EPA CT1100011)
What EPA records show for Aquarion-Plainville Regional, as of October 14, 2026
Health-standard violation: Groundwater Rule, Groundwater Rule, Feb 2026–Feb 2026 (EPA SDWIS).
Lead: 9 in 10 homes tested came in at or below 0 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: Jul 1, 2025–Dec 31, 2025). 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 4.
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 Aquarion-Plainville Regional use chloramine?
We didn't find chloramine in Aquarion-Plainville Regional's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)