PWSID
CT0350011
State
Connecticut
City
SHELTON
Population served
18,737
Primary source
SWP
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 Oct 2023). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
4.1 ppt
limit 4 ppt
PFBA
5.5 ppt
limit —
PFHxA
3.7 ppt
limit —
PFPeA
3 ppt
limit —
Violations & enforcement
2
Violations on record
0
Unaddressed
0
Health-based
8
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jan 2019. Official EPA record →
Recent enforcement actions
- State action · SIA Jan 2019
- State action · SOX Jul 2018
- State action · SIA Oct 2006
- State action · SOX Jul 2006
- State action · SOX Jan 2002
- State action · SIA Sep 1985
- State action · SOX Mar 1984
- State action · SIA Sep 1983
This profile is built from EPA public records for system CT0350011 — 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.