Official PFAS Records

Montana PFAS Watchlist

Official EPA UCMR 5 PFAS monitoring records for public water systems in Montana. 36 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

6,685

Total records

Official detections

Water System	PWSID	Analytes in records	Records	Detections
City of Billings Billings	MT0000153	PFPeSPFOAPFOSPFDoAHFPO-DA+24	116	0	View
Missoula Water Missoula	MT0000294	PFDoAPFBSPFHpAPFHxSPFNA+24	1305	0	View
City of Great Falls Great Falls	MT0000525	8:2FTSPFOS9Cl-PF3ONS11Cl-PF3OUdSNEtFOSAA+24	116	0	View
City of Bozeman Bozeman	MT0000161	PFMBAPFTrDAPFTeDAPFUnA11Cl-PF3OUdS+24	174	0	View
Butte Silverbow Water Dept Butte	MT0000170	PFBAPFHxAPFDAPFDoAPFOA+24	248	0	View
Helena Water System Helena	MT0000241	4:2FTSPFHxAPFHpS11Cl-PF3OUdSPFUnA+24	261	0	View
Kalispell Public Works Kalispell	MT0000259	PFMPAPFPeAPFMBANFDHAPFPeS+24	464	3 detected	View
Billings Heights Co Water Dist of Billings	MT0000155	PFPeANMeFOSAANEtFOSAAPFTrDAPFTeDA+24	29	0	View
City of Belgrade Belgrade	MT0000136	8:2FTSPFBAPFHxSNEtFOSAAPFDA+24	405	0	View
City of Whitefish Whitefish	MT0000357	NFDHAPFEESAPFMBAPFHpSPFHxA+24	116	0	View
City of Havre Havre	MT0000524	8:2FTSPFBSPFUnAPFHxAPFDoA+24	116	0	View
Town of West Yellowstone West Yellowstone	MT0003136	PFTrDADONAHFPO-DA6:2FTS8:2FTS+24	174	0	View
City of Miles City Miles City	MT0000291	PFBS6:2FTSPFMPAPFPeAPFMBA+24	116	0	View
Malmstrom Air Force Base Great Falls	MT0000515	PFDAPFHxAPFUnAPFBS11Cl-PF3OUdS+24	232	4 detected	View
Flathead County Water and Sewer Kalispell	MT0001744	9Cl-PF3ONS6:2FTSPFUnA11Cl-PF3OUdSDONA+24	232	0	View
City of Livingston Livingston	MT0000573	PFTeDAPFTrDANMeFOSAANEtFOSAA4:2FTS+24	348	0	View
Anaconda Water Department Anaconda	MT0000016	PFDoANMeFOSAANEtFOSAAPFTrDAPFTeDA+24	58	0	View
Laurel Municipal Water System Laurel	MT0000270	PFPeSPFNADONA9Cl-PF3ONS11Cl-PF3OUdS+24	116	0	View
Bigfork County Water and Sewer Bigfork	MT0000262	NMeFOSAAPFBAPFDAPFBS4:2FTS+24	58	0	View
City of Lewistown Lewistown	MT0000271	9Cl-PF3ONSNEtFOSAAHFPO-DAPFTeDAPFTrDA+24	58	0	View
Lockwood Water and Sewer District Billings	MT0000156	PFTrDANEtFOSAANMeFOSAA8:2FTSPFPeA+24	116	0	View
City of Hamilton Hamilton	MT0000234	PFDAPFBSDONAPFHpAPFHxA+24	232	1 detected	View
City of Polson Polson	MT0000308	DONAPFDoAPFDAPFOAHFPO-DA+24	145	0	View
City of Sidney Sidney	MT0000330	HFPO-DAPFHpAPFHxSPFNAPFOS+24	58	0	View
City of Libby	MT0000274	11Cl-PF3OUdSPFDoAPFPeSNFDHAPFEESA+24	87	0	View
City of Glendive	MT0000229	PFDoANEtFOSAAPFTrDAPFTeDA8:2FTS+24	87	0	View
City of Columbia Falls Columbia Falls	MT0000181	PFMPAPFBSPFHpAPFHxSPFNA+24	58	0	View
City of Dillon Dillon	MT0000201	PFHpA11Cl-PF3OUdSPFUnAPFHxAPFPeS+24	174	0	View
River Rock County Water and Sewer Dist Belgrade	MT0004082	PFHpAPFBSPFTeDA4:2FTSDONA+24	58	0	View
Big Sky County Water and Sewer Dist 363 Big Sky	MT0002385	PFMBAPFUnA4:2FTSPFHpSPFPeS+24	116	1 detected	View
City of Shelby Shelby	MT0000328	NEtFOSAAPFTeDA4:2FTSPFOAPFTrDA+24	58	0	View
City of Hardin Hardin	MT0000235	PFBSDONANFDHA4:2FTSNEtFOSAA+24	116	0	View
Sun Prairie Village County Great Falls	MT0000521	PFHxSPFDoAPFHxAPFDAPFOA+24	58	0	View
Phantom Hills Water System Missoula	MT0004379	DONAPFBAPFHpAPFHxSPFNA+24	58	0	View
Town of Pinesdale Pinesdale	MT0002926	PFBS11Cl-PF3OUdSPFHxAPFDoAPFDA+24	232	0	View
Town of Fairfield Fairfield	MT0000212	PFUnAPFEESAPFDoAPFDAPFOA+24	290	0	View

Source: EPA UCMR 5 Occurrence Data · Methodology

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