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

Systems with records

9,340

Total records

451

Official detections

Water System	PWSID	Analytes in records	Records	Detections
Regional Water Authority	CT0930011	PFTeDAPFHpAPFHxANMeFOSAAPFNA+24	297	15 detected	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	CT0640011	PFNAPFBSPFDAPFHxSPFBA+24	116	0	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	CT0150011	8:2FTSHFPO-DAPFBA6:2FTSPFHxS+24	229	14 detected	View
Aquarion-stamford	CT1350011	PFHxSNFDHANMeFOSAAPFBSPFHpA+24	232	5 detected	View
Waterbury Water Department	CT1510011	PFOSPFMBANEtFOSAAPFTeDAPFTrDA+24	116	0	View
Ctwc - Northern Reg-western System East Granby,East Windsor,Ellington,Enfield,Manchester,Mansfield,South Windsor,Stafford,Suffield,Tolland,Vernon,Windsor Locks	CT0473011	PFBSNFDHAPFTeDAPFTrDANEtFOSAA+24	245	17 detected	View
New Britain Water Department Berlin,Farmington,New Britain,Newington,Plainville,West Hartford	CT0890011	PFHpSPFMBAPFEESANFDHAPFPeS+24	116	0	View
Danbury Water Department	CT0340011	PFEESAPFHxSPFHpSNEtFOSAAPFTrDA+24	128	16 detected	View
Meriden Water Division Berlin,Cheshire,Meriden,Southington,Wallingford	CT0800011	11Cl-PF3OUdS9Cl-PF3ONSDONAHFPO-DA6:2FTS+24	190	12 detected	View
Aquarion-greenwich	CT0570011	PFHpS11Cl-PF3OUdSPFMPA8:2FTS4:2FTS+24	344	21 detected	View
Bristol Water Department	CT0170011	DONA11Cl-PF3OUdSPFOSPFNAPFHxS+24	119	3 detected	View
Manchester Water Department	CT0770021	11Cl-PF3OUdS9Cl-PF3ONSPFBA6:2FTSPFHpS+24	404	44 detected	View
Southington Water Department	CT1310011	11Cl-PF3OUdSNMeFOSAAPFUnAPFOAPFHxA+24	406	25 detected	View
South Norwalk Electric & Water	CT1030021	PFOSPFHxS9Cl-PF3ONSPFHpAPFBS+24	116	0	View
Middletown Water Department Cromwell,Middlefield,Middletown	CT0830011	PFTrDANEtFOSAANMeFOSAAPFTeDAPFPeS+24	149	0	View
Norwalk First Taxing District New Canaan,Norwalk,Westport,Wilton	CT1030011	PFDAPFOSPFNAPFHpADONA+24	147	16 detected	View
Torrington Water Company	CT1430011	6:2FTSPFHxAPFBAHFPO-DADONA+24	116	0	View
Wallingford Water Department	CT1480011	PFUnA4:2FTSPFBAHFPO-DADONA+24	61	3 detected	View
Norwich Public Utilities Bozrah,Franklin,Lebanon,Lisbon,Montville,Norwich,Preston	CT1040011	9Cl-PF3ONSNEtFOSAAPFTrDAPFTeDA6:2FTS+24	128	12 detected	View
Ctwc - Shoreline Region-guilford System	CT0608011	PFUnAPFDADONAPFHxAPFNA+24	417	24 detected	View
Groton Utilities Groton,Ledyard	CT0590011	PFTrDAHFPO-DAPFBA6:2FTS4:2FTS+24	116	0	View
New London Dept. of Public Utilities New London,Waterford	CT0950011	HFPO-DADONAPFBSPFHpAPFHxS+24	116	0	View
University of Connecticut - Main Campus Mansfield	CT0780021	DONA4:2FTSPFBS6:2FTSPFHxS+24	174	3 detected	View
Ctwc - Naugatuck Region-central System Beacon Falls,Naugatuck,Prospect,Waterbury	CT0880011	PFNAHFPO-DADONA9Cl-PF3ONS11Cl-PF3OUdS+24	116	0	View
Windham Water Works	CT1630011	PFDA11Cl-PF3OUdSPFTeDAPFOSNMeFOSAA+24	116	1 detected	View
Aquarion-darien	CT0350011	PFHpS6:2FTSPFOSPFOAPFDA+24	232	7 detected	View
Hazardville Water Company East Windsor,Enfield,Somers	CT0490021	PFBANFDHA11Cl-PF3OUdSPFHpSPFTeDA+24	72	14 detected	View
Aquarion-plainville Regional Bristol,Farmington,Plainville,Southington	CT1100011	PFOSPFOAPFBAPFPeSPFHxA+24	64	6 detected	View
Waterford Wpca Montville,New London,Waterford	CT1520071	PFBS4:2FTS6:2FTSPFBAHFPO-DA+24	116	0	View
East Lyme Water & Sewer Commission	CT0450011	PFDoAPFDANMeFOSAANEtFOSAAHFPO-DA+24	406	18 detected	View
Ctwc - Unionville System	CT0520011	4:2FTSPFPeS6:2FTSPFBAHFPO-DA+24	209	12 detected	View
Aquarion-simsbury Regional	CT1280021	9Cl-PF3ONS4:2FTS8:2FTSPFMPAPFPeA+24	90	7 detected	View
Cromwell Fire District Water Department Berlin,Cromwell	CT0330011	PFBSNFDHAPFHxSPFDoA9Cl-PF3ONS+24	58	3 detected	View
Aquarion-new Milford Regional Brookfield,New Milford	CT0960011	PFOSPFNAPFHxSPFBSPFBA+24	153	20 detected	View
Aquarion-valley	CT1240011	9Cl-PF3ONSDONAHFPO-DAPFPeA6:2FTS+24	265	18 detected	View
Avon Water Co	CT0040011	4:2FTSPFBSPFHpAPFHxS8:2FTS+24	93	14 detected	View
Aquarion-mystic	CT1370011	PFPeAPFHxSPFHxAPFDoAPFDA+24	174	1 detected	View
Aquarion-new Canaan New Canaan,Stamford	CT0900011	HFPO-DANFDHAPFDAPFMBANMeFOSAA+24	116	4 detected	View
Watertown Water & Sewer Authority Middlebury,Waterbury,Watertown	CT1530021	PFTrDAPFOSPFNAPFHxSPFHpA+24	116	0	View
Bethel Water Dept	CT0090011	6:2FTSPFPeAPFDoAPFHpAPFHxS+24	58	6 detected	View
Winsted Water Works Barkhamsted,Winchester	CT1620011	6:2FTSPFDAPFBSPFHpAPFHxS+24	116	0	View
Kensington Fire District Berlin,New Britain,Newington	CT0070011	PFUnANEtFOSAAPFMBAHFPO-DAPFBA+24	174	0	View
Aquarion-ridgefield	CT1180011	HFPO-DAPFDoADONA9Cl-PF3ONS11Cl-PF3OUdS+24	184	25 detected	View
Putnam Water Pollution Control Authority	CT1160011	NMeFOSAADONA9Cl-PF3ONS11Cl-PF3OUdSPFDoA+24	181	9 detected	View
Heritage Water Company	CT1300021	4:2FTSPFPeSPFBANMeFOSAANEtFOSAA+24	116	2 detected	View
Jewett City Water Company Griswold,Lisbon	CT0580011	9Cl-PF3ONSPFDAHFPO-DADONAPFHpS+24	120	1 detected	View
Watertown Fire District	CT1530011	6:2FTSPFUnAHFPO-DAPFEESAPFBA+24	58	0	View
Ctwc - Crystal System Brooklyn,Killingly	CT0690011	PFHxS6:2FTSPFTeDA8:2FTS11Cl-PF3OUdS+24	66	11 detected	View
Ctwc - Naugatuck Reg-collinsville Sys	CT0230011	PFHpAPFMPANFDHAPFPeSPFHpS+24	174	4 detected	View
Aquarion-newtown Regional	CT0970011	PFPeAPFHpAPFBS9Cl-PF3ONSNFDHA+24	73	24 detected	View
Ctwc - Naugatuck Reg-terryville System	CT1110011	PFPeSHFPO-DAPFBA9Cl-PF3ONS4:2FTS+24	116	0	View
Berlin Water Control Commission	CT0070021	PFMBAPFDoAPFDAPFUnA6:2FTS+24	232	1 detected	View
Ctwc - Shoreline Region-chester System	CT0261031	PFUnAPFHxAPFDoANMeFOSAAPFPeS+24	145	0	View
Portland Water Department	CT1130011	PFOAPFMPAPFPeAPFMBAPFEESA+24	116	6 detected	View
Colchester Sewer & Water Commission Colchester	CT0280011	PFTeDAPFTrDANEtFOSAANMeFOSAANFDHA+24	69	7 detected	View
Ctwc - Naugatuck Reg-thomaston System	CT1400011	PFOAPFDoANEtFOSAANMeFOSAAPFHxA+24	58	0	View
Aquarion-litchfield Regional Goshen,Litchfield,Torrington	CT0740011	PFBSPFUnAPFHxAPFDoAPFDA+24	232	0	View
Aquarion-new Hartford	CT0920011	4:2FTSDONANFDHA8:2FTSPFMPA+24	116	0	View
Ctwc - Coventry Hills Div Coventry	CT0320091	NMeFOSAANEtFOSAAPFTrDAPFTeDAPFOS+24	58	0	View

Source: EPA UCMR 5 Occurrence Data · Methodology

All states Connecticut utility directory