Official PFAS Records
Connecticut PFAS Watchlist
Official EPA UCMR 5 PFAS monitoring records for public water systems in Connecticut. 59 water systems with qualifying official records.
Source retrieved: May 26, 2026 · EPA UCMR 5
Monitoring results are not compliance determinations. Missing records do not establish absence of PFAS. Methodology
59
Systems with records
9,340
Total records
451
Official detections
| Water System | Records | |
|---|---|---|
Regional Water Authority | 297 | View |
Metropolitan District Commission Berlin,Bloomfield,Cromwell,East Granby,East Hartford,Farmington,Glastonbury,Hartford,Manchester,Newington,Portland,Rocky Hill,South Windsor,West Hartford,Wethersfield,Windsor,Windsor Locks | 116 | View |
Aquarion-eastern Fairfield County Beacon Falls,Bridgeport,Darien,Easton,Fairfield,Greenwich,Monroe,New Canaan,Newtown,Norwalk,Redding,Ridgefield,Seymour,Shelton,Stamford,Stratford,Trumbull,Weston,Westport,Wilton | 229 | View |
Aquarion-stamford | 232 | View |
Waterbury Water Department | 116 | View |
Ctwc - Northern Reg-western System East Granby,East Windsor,Ellington,Enfield,Manchester,Mansfield,South Windsor,Stafford,Suffield,Tolland,Vernon,Windsor Locks | 245 | View |
New Britain Water Department Berlin,Farmington,New Britain,Newington,Plainville,West Hartford | 116 | View |
Danbury Water Department | 128 | View |
Meriden Water Division Berlin,Cheshire,Meriden,Southington,Wallingford | 190 | View |
Aquarion-greenwich | 344 | View |
Bristol Water Department | 119 | View |
Manchester Water Department | 404 | View |
Southington Water Department | 406 | View |
South Norwalk Electric & Water | 116 | View |
Middletown Water Department Cromwell,Middlefield,Middletown | 149 | View |
Norwalk First Taxing District New Canaan,Norwalk,Westport,Wilton | 147 | View |
Torrington Water Company | 116 | View |
Wallingford Water Department | 61 | View |
Norwich Public Utilities Bozrah,Franklin,Lebanon,Lisbon,Montville,Norwich,Preston | 128 | View |
Ctwc - Shoreline Region-guilford System | 417 | View |
Groton Utilities Groton,Ledyard | 116 | View |
New London Dept. of Public Utilities New London,Waterford | 116 | View |
University of Connecticut - Main Campus Mansfield | 174 | View |
Ctwc - Naugatuck Region-central System Beacon Falls,Naugatuck,Prospect,Waterbury | 116 | View |
Windham Water Works | 116 | View |
Aquarion-darien | 232 | View |
Hazardville Water Company East Windsor,Enfield,Somers | 72 | View |
Aquarion-plainville Regional Bristol,Farmington,Plainville,Southington | 64 | View |
Waterford Wpca Montville,New London,Waterford | 116 | View |
East Lyme Water & Sewer Commission | 406 | View |
Ctwc - Unionville System | 209 | View |
Aquarion-simsbury Regional | 90 | View |
Cromwell Fire District Water Department Berlin,Cromwell | 58 | View |
Aquarion-new Milford Regional Brookfield,New Milford | 153 | View |
Aquarion-valley | 265 | View |
Avon Water Co | 93 | View |
Aquarion-mystic | 174 | View |
Aquarion-new Canaan New Canaan,Stamford | 116 | View |
Watertown Water & Sewer Authority Middlebury,Waterbury,Watertown | 116 | View |
Bethel Water Dept | 58 | View |
Winsted Water Works Barkhamsted,Winchester | 116 | View |
Kensington Fire District Berlin,New Britain,Newington | 174 | View |
Aquarion-ridgefield | 184 | View |
Putnam Water Pollution Control Authority | 181 | View |
Heritage Water Company | 116 | View |
Jewett City Water Company Griswold,Lisbon | 120 | View |
Watertown Fire District | 58 | View |
Ctwc - Crystal System Brooklyn,Killingly | 66 | View |
Ctwc - Naugatuck Reg-collinsville Sys | 174 | View |
Aquarion-newtown Regional | 73 | View |
Ctwc - Naugatuck Reg-terryville System | 116 | View |
Berlin Water Control Commission | 232 | View |
Ctwc - Shoreline Region-chester System | 145 | View |
Portland Water Department | 116 | View |
Colchester Sewer & Water Commission Colchester | 69 | View |
Ctwc - Naugatuck Reg-thomaston System | 58 | View |
Aquarion-litchfield Regional Goshen,Litchfield,Torrington | 232 | View |
Aquarion-new Hartford | 116 | View |
Ctwc - Coventry Hills Div Coventry | 58 | View |
Source: EPA UCMR 5 Occurrence Data · Methodology