PWSID
CT0170011
State
Connecticut
City
BRISTOL
Population served
52,079
Primary source
Surface water
Score history
▼ 9 points — the score moved from 100 to 91 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Mar 2024). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
4.1 ppt
limit 4 ppt
PFPeA
3.1 ppt
limit —
Violations & enforcement
118
Violations on record
0
Unaddressed
2
Health-based
52
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →
Recent enforcement actions
- State action · SOX Sep 2025
- State action · SOX Oct 2022
- State action · SIF May 2020
- State action · SIA Apr 2020
- State action · SOX Apr 2020
- State action · SIA Apr 2020
- State action · SIE Apr 2020
- State action · SOX Mar 2020
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
2 stations · latest Oct 2024
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system CT0170011 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.