How many Connecticut water systems are over the federal PFAS limit?

35 public water systems in Connecticut had at least one PFAS above a federal maximum contaminant level in EPA UCMR 5 testing (2023–2025). Each one is listed on this page with its actual levels and the filter that removes them.

PFAS in Connecticut water

The EPA tested public water systems across Connecticut for 29 PFAS. In 35 of them, at least one came back above a federal limit. Find your system below — you'll get the actual levels, our plain verdict on each compound, and the filter that genuinely removes it. We sell nothing.

Not listed? Your system may not have been sampled, or nothing exceeded a limit — see the national picture.

Aquarion Water Co Of Ct-Greenwich System 2 over the limit
Aquarion Water Co Of Ct-Main System 2 over the limit
Aquarion Water Co Of Ct-New Canaan Sys 1 over the limit
Aquarion Water Co Of Ct-New Milford 2 over the limit
Aquarion Water Co Of Ct-Newtown System 2 over the limit
Aquarion Water Co Of Ct-Noroton System 1 over the limit
Aquarion Water Co Of Ct-Ridgefield Sys 2 over the limit
Aquarion Water Co Of Ct-Simsbury System 2 over the limit
Aquarion Water Co Of Ct-Stamford 1 over the limit
Aquarion Water Co Of Ct-Tlwc Woodrich 2 over the limit
Aquarion Water Co Of Ct-Valley System 2 over the limit
Avon Water Co. 2 over the limit
Bethel Water Dept 1 over the limit
Bristol Water Department 1 over the limit
Colchester Sewer & Water Commission 1 over the limit
Cromwell Fire District Water Department 1 over the limit
Ctwc - Crystal System 2 over the limit
Ctwc - Naugatuck Reg-Collinsville Sys 2 over the limit
Ctwc - Northern Reg-Western System 2 over the limit
Ctwc - Shoreline Region-Guilford System 2 over the limit
Ctwc - Unionville System 2 over the limit
Danbury Water Department 1 over the limit
East Lyme Water & Sewer Commission 2 over the limit
Hazardville Water Company 2 over the limit
Heritage Water Company 1 over the limit
Manchester Water Department 2 over the limit
Meriden Water Division 2 over the limit
Norwalk First Taxing District 2 over the limit
Norwich Public Utilities 3 over the limit
Putnam Water Pollution Control Authority 2 over the limit
Regional Water Authority 2 over the limit
Southington Water Department 2 over the limit
University Of Connecticut - Main Campus 1 over the limit
Valley Water Systems, Inc. 2 over the limit
Wallingford Water Department 2 over the limit

Source: US EPA UCMR 5 occurrence data, 2023–2025. · All states