Official PFAS Records

Maryland PFAS Watchlist

Official EPA UCMR 5 PFAS monitoring records for public water systems in Maryland. 74 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

Maryland PFAS dataset — for journalists & researchers

Full state-level detection data with downloadable CSV, methodology, and citation formats.

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Systems with records

15,312

Total records

484

Official detections

Water System	PWSID	Analytes in records	Records	Detections
Washington Suburban Sanitary Commission Bethesda	MD0150005	6:2FTSPFHpAPFHxSPFNAPFOS+24	232	8 detected	View
City of Baltimore Baltimore	MD0300002	8:2FTSPFHpAPFMBAPFEESAPFOS+24	348	1 detected	View
Glen Burnie-broadneck	MD0020017	PFHxAPFTeDAPFHxS9Cl-PF3ONSPFHpS+24	232	0	View
Howard County D.p.w. Distribution	MD0130002	PFPeAHFPO-DADONA9Cl-PF3ONS11Cl-PF3OUdS+24	232	4 detected	View
Harford County D.p.w.	MD0120016	PFDAPFOSNMeFOSAA8:2FTSPFMPA+24	290	0	View
City of Hagerstown Hagerstown	MD0210010	PFHpAPFDA6:2FTSPFBAHFPO-DA+24	116	0	View
Waldorf - Charles County Dpw Waldorf	MD0080049	PFPeAPFMPAPFHpSPFEESANFDHA+24	1044	8 detected	View
New Design - Frederick County Frederick	MD0100030	PFEESANFDHAPFPeSPFHpAPFPeA+24	116	1 detected	View
Crofton-odenton	MD0020008	PFDAPFBSPFHpAPFHxSPFNA+24	58	0	View
Fort George G. Meade	MD0020012	DONAPFMBAPFNANFDHAPFHpS+24	58	0	View
City of Frederick Frederick	MD0100015	PFOAPFDoAPFHxAPFUnAPFMPA+24	464	1 detected	View
City of Rockville Rockville	MD0150003	PFHxAHFPO-DAPFBSPFHpAPFHxS+24	116	7 detected	View
Lexington Park	MD0180007	8:2FTSPFOAPFDAPFDoANFDHA+24	116	0	View
City of Westminster	MD0060015	NFDHAPFBAPFHxAPFUnA11Cl-PF3OUdS+24	812	69 detected	View
City of Annapolis Annapolis	MD0020001	PFPeSPFBA9Cl-PF3ONS11Cl-PF3OUdSPFUnA+24	58	0	View
City of Salisbury	MD0220004	PFOSPFNAPFHxSPFHpA8:2FTS+24	116	11 detected	View
Town of Ocean City	MD0230003	PFMPAPFHxSPFEESAPFPeAPFBS+24	116	0	View
City of Cumberland	MD0010008	11Cl-PF3OUdSPFHpS6:2FTS8:2FTSPFMBA+24	116	0	View
Broad Creek	MD0020004	PFTeDAPFMBA11Cl-PF3OUdS9Cl-PF3ONSDONA+24	58	0	View
City of Bowie Bowie	MD0160002	PFHpS6:2FTS4:2FTS8:2FTSPFOA+24	58	0	View
Freedom District	MD0060002	PFUnA6:2FTSPFOSPFMBAPFEESA+24	116	4 detected	View
Patuxent Naval Air Station (navfac-wash)	MD0180022	PFTrDANEtFOSAANMeFOSAAPFDAPFDoA+24	754	0	View
City of Aberdeen	MD0120001	8:2FTSNFDHA6:2FTSPFOAPFTeDA+24	174	16 detected	View
Easton Utilities	MD0200003	DONAPFDoA8:2FTSPFHxAPFUnA+24	232	0	View
Town of Elkton	MD0070011	PFDoAHFPO-DAPFEESA4:2FTSPFHxS+24	319	50 detected	View
Chapel Hill - Aberdeen Proving Grounds	MD0120002	NFDHAPFPeSPFHpS9Cl-PF3ONSPFMBA+24	58	0	View
City of Cambridge Water	MD0090002	8:2FTSHFPO-DAPFBA6:2FTS4:2FTS+24	232	0	View
City of Havre De Grace	MD0120012	PFHxSPFBAPFTrDANEtFOSAANMeFOSAA+24	116	0	View
Maryland American Water Company	MD0120003	NEtFOSAAPFPeAPFHxS6:2FTSPFOS+24	174	21 detected	View
Ocean Pines	MD0230005	PFEESAPFBADONAPFBSPFHpA+24	290	4 detected	View
Town of La Plata	MD0080025	PFNAPFOSPFOAPFDAPFDoA+24	261	0	View
City of Frostburg	MD0010011	PFDA8:2FTSPFPeSPFDoAPFMBA+24	116	0	View
Town of Mount Airy	MD0060007	PFEESADONAPFHpSPFNAPFPeS+24	290	33 detected	View
Chesapeake Ranch Estates	MD0040004	PFHxAPFTrDAPFTeDA9Cl-PF3ONS11Cl-PF3OUdS+24	232	0	View
Stevensville	MD0170019	PFNAPFOAPFDAPFDoAPFHxA+24	348	0	View
U.s. Naval Academy	MD0020042	PFBSPFTrDAPFNAPFOSDONA+24	58	0	View
Town of North East	MD0070016	HFPO-DAPFHxSNMeFOSAANEtFOSAAPFTrDA+24	232	1 detected	View
Town of Walkersville	MD0100025	PFTrDAPFTeDANMeFOSAAHFPO-DANEtFOSAA+24	116	0	View
Fort Detrick	MD0100011	PFBS8:2FTS4:2FTSPFMPAPFPeA+24	87	1 detected	View
City of Brunswick	MD0100005	9Cl-PF3ONS8:2FTSPFMPANMeFOSAAPFTeDA+24	232	0	View
City of Taneytown	MD0060012	PFTeDAHFPO-DAPFBA6:2FTS4:2FTS+24	406	21 detected	View
Town of Hampstead	MD0060003	DONA9Cl-PF3ONS11Cl-PF3OUdS6:2FTSPFDA+24	580	77 detected	View
Bryans Road	MD0080033	PFTrDAPFEESA6:2FTSPFPeSPFNA+24	232	0	View
Town of Thurmont	MD0100023	DONAHFPO-DANMeFOSAANEtFOSAAPFTrDA+24	232	31 detected	View
Town of Poolesville	MD0150002	4:2FTSPFOSPFHxAPFDoAPFDA+24	551	42 detected	View
Mystic Harbour	MD0230011	PFPeSPFDoAPFMPA11Cl-PF3OUdSPFOS+24	232	0	View
City of Fruitland	MD0220008	PFBSNMeFOSAANEtFOSAAPFTrDAPFHxS+24	29	2 detected	View
Eastern Region Allegany Distrib. System	MD0010005	PFHpSPFPeSNFDHAPFEESAPFPeA+24	116	0	View
Lavale Sanitary Commission	MD0010016	NMeFOSAAPFTrDANEtFOSAAPFTeDAPFDA+24	232	0	View
Maryland American Water--severn System	MD0020027	PFDoAPFTrDANMeFOSAANFDHAPFHxA+24	58	0	View
Town of Chestertown	MD0140002	PFEESAPFBS9Cl-PF3ONSDONAHFPO-DA+24	58	0	View
Midland-lonaconing	MD0010018	6:2FTSNMeFOSAAPFTrDANFDHANEtFOSAA+24	145	0	View
Town of Chesapeake Beach	MD0040003	NMeFOSAAPFBAHFPO-DAPFPeAPFTrDA+24	174	0	View
Western Region Allegany Distrib. System	MD0010009	PFBAPFHxA4:2FTSPFDoAPFHpS+24	87	0	View
Town of Manchester	MD0060006	PFPeAPFUnA4:2FTSPFDoAPFOS+24	638	42 detected	View
Town of Berlin	MD0230001	PFTeDAPFTrDANEtFOSAANMeFOSAAPFNA+24	174	9 detected	View
Town of Denton	MD0050001	PFHxAPFTrDANEtFOSAANMeFOSAAPFMPA+24	87	0	View
Town of Delmar	MD0220001	9Cl-PF3ONSPFPeSNEtFOSAAPFMBAPFUnA+24	58	0	View
Town of Perryville	MD0070018	9Cl-PF3ONSPFHpAPFHxSPFNAPFBS+24	116	0	View
Prince Frederick Frederick	MD0040011	PFTeDA8:2FTSPFPeAPFHxSPFUnA+24	116	0	View
Town of Middletown	MD0100018	PFDAPFOA11Cl-PF3OUdSPFHpAPFOS+24	87	11 detected	View
Boonsboro - Keedysville	MD0210002	PFNA4:2FTSPFHxAPFDoAPFDA+24	261	9 detected	View
City of Pocomoke City	MD0230006	PFHpANFDHAPFHxAPFHxSPFBS+24	58	0	View
Town of Indian Head	MD0080020	PFTrDAPFMBADONAHFPO-DAPFBA+24	174	0	View
The Provinces	MD0020029	PFMPA9Cl-PF3ONSDONAHFPO-DAPFBA+24	58	0	View
Solomons	MD0040027	PFHxSPFHpAPFPeSPFDAPFHpS+24	116	0	View
Eastern Correctional Institute	MD0190013	PFPeA11Cl-PF3OUdS9Cl-PF3ONSDONAHFPO-DA+24	58	0	View
Elkton West	MD0070015	PFBSPFOAPFPeSPFHxSPFBA+24	58	0	View
Town of Centreville	MD0170001	4:2FTS8:2FTSPFMPAPFPeAPFEESA+24	116	0	View
Naval Support Facility, Indian Head	MD0080058	8:2FTSPFHpSPFPeSNFDHAPFEESA+24	232	0	View
Town of Princess Anne	MD0190002	PFHxSPFBAHFPO-DADONA9Cl-PF3ONS+24	406	0	View
Town of Hancock	MD0210012	NEtFOSAANMeFOSAAPFHpAPFEESANFDHA+24	58	0	View
Piney Point	MD0180034	PFTrDAPFTeDANEtFOSAAPFPeSNFDHA+24	58	0	View
Town of Millington	MD0140010	PFBSPFHpAPFHxSNMeFOSAANEtFOSAA+24	58	0	View

Source: EPA UCMR 5 Occurrence Data · Methodology

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