Official PFAS Records

Maryland PFAS Watchlist

Official EPA UCMR 5 PFAS monitoring records for public water systems in Maryland. 63 water systems with qualifying official records.

Source retrieved: April 20, 2026 · EPA UCMR 5

Monitoring results are not compliance determinations. Missing records do not establish absence of PFAS. Methodology

Systems with records

11,739

Total records

472

Official detections

Water System	PWSID	Analytes in records	Records	Detections
Washington Suburban Sanitary Commission Bethesda	MD0150005	6:2FTSPFHpAPFHxSPFNAPFOS+24	232	8 detected	View
Glen Burnie-broadneck	MD0020017	9Cl-PF3ONSDONAHFPO-DAPFDoA6:2FTS+24	232	0	View
Howard County D.p.w. Distribution	MD0130002	PFDoA6:2FTSPFBAPFBSPFNA+24	232	4 detected	View
Harford County D.p.w.	MD0120016	4:2FTS9Cl-PF3ONS11Cl-PF3OUdSPFHxAPFBS+24	290	0	View
City of Hagerstown Hagerstown	MD0210010	PFUnA11Cl-PF3OUdS9Cl-PF3ONSDONAHFPO-DA+24	116	0	View
Waldorf - Charles County Dpw Waldorf	MD0080049	PFDoA4:2FTS6:2FTSHFPO-DA11Cl-PF3OUdS+24	330	0	View
New Design - Frederick County Frederick	MD0100030	PFHpS9Cl-PF3ONS8:2FTS4:2FTS6:2FTS+24	116	1 detected	View
Crofton-odenton	MD0020008	DONAPFOAHFPO-DAPFBAPFEESA+24	58	0	View
Fort George G. Meade	MD0020012	PFTrDAPFHpSPFBA6:2FTS4:2FTS+24	58	0	View
City of Frederick Frederick	MD0100015	NFDHAPFBSPFHpAPFPeAPFPeS+14	19	0	View
City of Rockville Rockville	MD0150003	PFTeDAPFTrDANEtFOSAANMeFOSAA9Cl-PF3ONS+24	116	7 detected	View
Lexington Park	MD0180007	PFHxSPFDoAPFDAPFOAPFNA+24	116	0	View
City of Westminster	MD0060015	PFNANEtFOSAANMeFOSAAPFBSPFHpA+24	812	69 detected	View
City of Annapolis Annapolis	MD0020001	PFOAPFPeSPFBA4:2FTSPFMBA+24	58	0	View
City of Salisbury	MD0220004	PFTeDAHFPO-DADONA9Cl-PF3ONS11Cl-PF3OUdS+24	116	11 detected	View
Town of Ocean City	MD0230003	PFHxSNFDHAPFPeSPFOAPFHpA+24	116	0	View
City of Cumberland	MD0010008	PFOSPFHpS6:2FTS8:2FTSPFMBA+24	116	0	View
Broad Creek	MD0020004	PFNAPFHxSPFHpAPFBSPFHpS+24	58	0	View
City of Bowie Bowie	MD0160002	PFMPAPFDoAPFTrDAPFBSPFHxS+24	58	0	View
Freedom District	MD0060002	6:2FTSPFHpSPFHxAPFMPA8:2FTS+24	116	4 detected	View
Patuxent Naval Air Station (navfac-wash)	MD0180022	8:2FTSPFTrDA9Cl-PF3ONSPFTeDAHFPO-DA+24	733	0	View
City of Aberdeen	MD0120001	PFHpSPFHpAPFHxSPFNAPFOS+24	174	16 detected	View
Town of Elkton	MD0070011	PFDAPFHxAPFUnA11Cl-PF3OUdSPFDoA+24	319	50 detected	View
Chapel Hill - Aberdeen Proving Grounds	MD0120002	PFHxAPFUnA11Cl-PF3OUdSDONAPFMPA+24	58	0	View
City of Havre De Grace	MD0120012	PFHxSPFDoAPFHxAPFUnA11Cl-PF3OUdS+24	116	0	View
Maryland American Water Company	MD0120003	PFBAPFUnA11Cl-PF3OUdS9Cl-PF3ONSPFNA+24	174	21 detected	View
Ocean Pines	MD0230005	PFMPA8:2FTS4:2FTS6:2FTSPFOS+24	239	3 detected	View
Town of La Plata	MD0080025	6:2FTSPFOAPFNANMeFOSAAPFTrDA+24	261	0	View
City of Frostburg	MD0010011	PFDAPFOA4:2FTSPFOSPFNA+24	116	0	View
Town of Mount Airy	MD0060007	PFHxAPFDoAPFDAPFTrDAPFPeS+24	290	33 detected	View
Chesapeake Ranch Estates	MD0040004	6:2FTS9Cl-PF3ONSPFUnA11Cl-PF3OUdSPFHxA+24	232	0	View
Stevensville	MD0170019	PFTrDAPFOA6:2FTSPFHpSPFTeDA+24	348	0	View
U.s. Naval Academy	MD0020042	11Cl-PF3OUdSPFBSPFHxSPFTrDAPFNA+24	58	0	View
Town of North East	MD0070016	PFBAPFDAPFTeDAHFPO-DAPFHxS+24	232	1 detected	View
Town of Walkersville	MD0100025	PFHxAPFPeSPFPeAPFMPA8:2FTS+24	116	0	View
City of Taneytown	MD0060012	PFMPAPFNAPFHxSPFHpAPFBS+24	406	21 detected	View
Town of Hampstead	MD0060003	11Cl-PF3OUdSDONANEtFOSAAPFTrDAPFTeDA+24	580	77 detected	View
Bryans Road	MD0080033	PFMBAPFOSPFBSPFHpAPFHxS+24	232	0	View
Town of Thurmont	MD0100023	NMeFOSAAPFPeADONAHFPO-DANEtFOSAA+24	232	31 detected	View
Town of Poolesville	MD0150002	4:2FTSNMeFOSAANEtFOSAAPFTrDAPFTeDA+24	551	42 detected	View
City of Fruitland	MD0220008	PFHpAPFOS6:2FTSPFHxSPFOA+24	29	2 detected	View
Eastern Region Allegany Distrib. System	MD0010005	PFDAPFHxAHFPO-DAPFDoAPFHpS+24	116	0	View
Lavale Sanitary Commission	MD0010016	NMeFOSAAPFTrDANEtFOSAAPFTeDANFDHA+24	232	0	View
Maryland American Water--severn System	MD0020027	6:2FTSPFTeDAPFDAPFOAPFOS+24	58	0	View
Town of Chestertown	MD0140002	PFBSPFTrDAPFTeDANEtFOSAANMeFOSAA+24	58	0	View
Town of Chesapeake Beach	MD0040003	6:2FTS4:2FTS8:2FTSPFMPAPFTeDA+24	174	0	View
Midland-lonaconing	MD0010018	PFMPA8:2FTS4:2FTSPFUnAPFOA+24	145	0	View
Western Region Allegany Distrib. System	MD0010009	NFDHAHFPO-DAPFBA8:2FTSPFMPA+24	87	0	View
Town of Manchester	MD0060006	HFPO-DANEtFOSAAPFBAPFEESANFDHA+24	638	42 detected	View
Town of Denton	MD0050001	PFNAPFMPAPFDANMeFOSAAPFHxS+24	87	0	View
Town of Delmar	MD0220001	PFTrDAPFHxAPFDoAPFDAPFOA+24	58	0	View
Town of Berlin	MD0230001	PFTeDAPFTrDANEtFOSAANMeFOSAAPFPeA+24	174	9 detected	View
Town of Perryville	MD0070018	NEtFOSAAPFTrDAPFTeDA4:2FTS8:2FTS+24	116	0	View
Prince Frederick Frederick	MD0040011	NMeFOSAAPFHpANFDHAPFPeSPFHxS+24	116	0	View
Town of Middletown	MD0100018	PFPeSNFDHAPFEESAPFMBAPFPeA+24	87	11 detected	View
Boonsboro - Keedysville	MD0210002	PFEESAPFUnA11Cl-PF3OUdS9Cl-PF3ONSDONA+24	94	9 detected	View
Town of Indian Head	MD0080020	PFPeSPFBS6:2FTSPFPeA9Cl-PF3ONS+24	174	0	View
The Provinces	MD0020029	PFHpAPFHxSPFNAPFOSPFOA+24	58	0	View
Solomons	MD0040027	NFDHAPFUnAPFDoAPFOAPFTrDA+24	116	0	View
Elkton West	MD0070015	PFDoAPFTeDA8:2FTSPFMPAPFPeA+24	58	0	View
Town of Centreville	MD0170001	PFEESAHFPO-DAPFDAPFMBADONA+24	116	0	View
Town of Hancock	MD0210012	PFDoAPFHpS6:2FTSPFDAPFOA+24	58	0	View
Town of Millington	MD0140010	8:2FTSPFBSPFHpAPFHxSNMeFOSAA+24	58	0	View

Source: EPA UCMR 5 Occurrence Data · Methodology

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