By State · CT
Based on EPA UCMR 5 testing of 40 public water systems with PFAS detected in Connecticut.
See Connecticut on the national heatmapState totals reflect systems with at least one PFAS detection in UCMR 5 (the canonical EPA dataset). The 6,151 national total includes ~123 additional systems in US territories and on tribal lands not browsable as state pages.
Most contaminated in Connecticut
35 Connecticut water systems tested above EPA PFAS limits. The most severe is NORWICH PUBLIC UTILITIES, where PFOS measured 16.2 ppt — 4.0× the federal limit.
State context
Industrial context
Connecticut's PFAS issues center on AFFF release at the Bradley Air National Guard Base (Windsor Locks) and legacy industrial corridors along the Connecticut River. Aerospace manufacturing in central Connecticut is a secondary concern.
Regulatory stance
Connecticut's Department of Public Health adopted state-level Action Levels for PFAS in drinking water in 2020, predating the federal EPA MCLs.
Notable sites
The 2019 Bradley Airport AFFF release sent an estimated 40,000 gallons of foam concentrate into the Farmington River, drawing national attention to AFFF risk.
Editorial summary compiled from public DoD, EPA, and state agency disclosures. Not a comprehensive site inventory — for the authoritative list of PFAS investigation locations in Connecticut, consult your state environmental agency.
Systems with detections · EPA UCMR 5 (2023–2025)
Get specific results for your neighborhood's water utility.
City overviews aggregate every utility and ZIP code in the area. Don't see your city? Use the ZIP lookup above — every Connecticut ZIP has a result.
Click any row to see ZIP-level details. Click PWSID to see the full utility page.
Test your water
EPA UCMR 5 tested 40 public water systems in Connecticut — but at the utility entry point, not your tap. Aging pipes and indoor plumbing can change what reaches your home, and private wells aren't covered by UCMR 5 at all. To find out what's actually in your water, test it with a certified lab.
How PFAS water testing works
EPA Method 537.1 in plain English — what a certified lab actually measures
Order a certified mail-in test kit
PFAS mail-in kits from about $85 (Cyclopure, Tap Score)
On a private well in Connecticut?
Wells aren't covered by EPA testing — your own testing guide
Connecticut testing resources
Compiled from official Connecticut state sources. Programs and eligibility change — confirm current details with the agency.
