Official PFAS Records

Montana PFAS Watchlist

Official EPA UCMR 5 PFAS monitoring records for public water systems in Montana. 21 water systems with qualifying official records.

Source retrieved: May 14, 2026 · EPA UCMR 5

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

Systems with records

4,171

Total records

Official detections

Water System	PWSID	Analytes in records	Records	Detections
City of Billings Billings	MT0000153	PFMPAPFHxSPFHpAPFBSPFHpS+24	116	0	View
Missoula Water Missoula	MT0000294	NMeFOSAAPFOANEtFOSAAPFTrDAPFTeDA+24	908	0	View
City of Bozeman Bozeman	MT0000161	PFBANMeFOSAAPFMPAPFPeAPFMBA+24	174	0	View
Butte Silverbow Water Dept Butte	MT0000170	PFPeSPFOSPFBSHFPO-DADONA+24	248	0	View
Helena Water System Helena	MT0000241	6:2FTSPFUnAPFDoA9Cl-PF3ONSPFHpS+24	261	0	View
Kalispell Public Works Kalispell	MT0000259	4:2FTSNMeFOSAANEtFOSAAPFTeDAPFTrDA+24	464	3 detected	View
Billings Heights Co Water Dist of Billings	MT0000155	11Cl-PF3OUdSPFHpS9Cl-PF3ONSPFBSPFDoA+24	29	0	View
City of Belgrade Belgrade	MT0000136	PFTrDAPFMBA8:2FTSPFMPAPFPeA+24	405	0	View
City of Miles City Miles City	MT0000291	PFBSHFPO-DA4:2FTS9Cl-PF3ONS11Cl-PF3OUdS+24	116	0	View
Anaconda Water Department Anaconda	MT0000016	NEtFOSAAPFTrDAPFTeDAPFHxAPFUnA+24	58	0	View
Laurel Municipal Water System Laurel	MT0000270	6:2FTSPFHpSHFPO-DANEtFOSAAPFTrDA+24	116	0	View
Bigfork County Water and Sewer Bigfork	MT0000262	PFDAPFBS4:2FTSPFTeDANEtFOSAA+24	58	0	View
City of Lewistown Lewistown	MT0000271	NEtFOSAANMeFOSAA6:2FTSPFBSPFHpA+24	58	0	View
Lockwood Water and Sewer District Billings	MT0000156	NFDHAPFTrDANEtFOSAANMeFOSAA8:2FTS+24	116	0	View
City of Hamilton Hamilton	MT0000234	PFEESAPFMBAPFPeAPFHpAPFHxS+24	232	1 detected	View
City of Libby	MT0000274	11Cl-PF3OUdSPFUnAPFTeDAPFTrDANEtFOSAA+24	87	0	View
City of Glendive	MT0000229	PFMBAPFDoANEtFOSAAPFTrDAPFTeDA+24	87	0	View
City of Columbia Falls Columbia Falls	MT0000181	DONA9Cl-PF3ONSPFMBAPFEESA11Cl-PF3OUdS+24	58	0	View
City of Dillon Dillon	MT0000201	PFTrDANEtFOSAANMeFOSAAPFHxAPFHpA+24	174	0	View
City of Hardin Hardin	MT0000235	PFNAPFBA6:2FTSPFHpS8:2FTS+24	116	0	View
Town of Fairfield Fairfield	MT0000212	4:2FTS8:2FTSPFMPAPFPeAPFMBA+24	290	0	View

Source: EPA UCMR 5 Occurrence Data · Methodology

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