Official PFAS Records

Wisconsin PFAS Watchlist

Official EPA UCMR 5 PFAS monitoring records for public water systems in Wisconsin. 50 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

Wisconsin PFAS dataset — for journalists & researchers

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

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Systems with records

428

Total records

428

Official detections

Water System	PWSID	Analytes in records	Records	Detections
Madison Water Utility Madison	WI1130224	PFHxSPFBA	6	6 detected	View
Appleton Waterworks Menasha	WI4450333	PFBA	1	1 detected	View
Eau Claire Waterworks Eau Claire	WI6180230	PFHxSPFBS	3	3 detected	View
La Crosse Waterworks La Crosse	WI6320309	PFBAPFBSPFHxSPFOSPFPeA+2	32	32 detected	View
Wausau Waterworks Wausau	WI7370102	PFBA	1	1 detected	View
City of Beloit Beloit	WI1540112	PFBS	1	1 detected	View
West Bend Waterworks West Bend	WI2670120	PFBSPFOA	2	2 detected	View
Brookfield Water Utility Brookfield	WI2680253	PFPeAPFHxAPFBSPFHxS	13	13 detected	View
Marshfield Utilities Marshfield	WI7720165	PFPeAPFHxAPFHpAPFHxSPFBA+2	13	13 detected	View
Hudson Waterworks Hudson	WI6560087	PFBA	7	7 detected	View
Onalaska Waterworks Onalaska	WI6320327	PFBS	2	2 detected	View
Weston Municipal Utilities Weston	WI7370163	PFHxSPFHxAPFBSPFOAPFOS+3	29	29 detected	View
Oconomowoc Waterworks Oconomowoc	WI2680227	PFBSPFBA	4	4 detected	View
Hartford Waterworks Hartford	WI2670110	PFHxSPFOSPFOAPFBS	10	10 detected	View
Verona Waterworks Verona	WI1130259	PFBS	3	3 detected	View
Plover Waterworks Plover	WI7500726	PFBA	2	2 detected	View
Chippewa Falls Waterworks Chippewa Falls	WI6090456	PFBS	1	1 detected	View
Stoughton Waterworks Stoughton	WI1130078	PFHxS	2	2 detected	View
New Richmond Waterworks New Richmond	WI6560126	PFBA	2	2 detected	View
Portage Waterworks Portage	WI1110039	PFHxS	2	2 detected	View
Holmen Waterworks Holmen	WI6320306	PFPeA	1	1 detected	View
Reedsburg Waterworks Reedsburg	WI1570102	PFHxS	2	2 detected	View
Sturgeon Bay Waterworks Sturgeon Bay	WI4150526	PFHxSPFOS	8	8 detected	View
Mcfarland Waterworks Mc Farland	WI1130241	PFHxS	2	2 detected	View
Hartland Waterworks Hartland	WI2680205	PFHxAPFBSPFPeAPFHxSPFBA+2	33	33 detected	View
Tomah Waterworks Tomah	WI6420254	PFHxSPFPeAPFHxA	7	7 detected	View
Pewaukee City Water and Sewer Utility Pewaukee	WI2680214	PFOSPFHxAPFHxSPFPeA6:2FTS+5	41	41 detected	View
Monona Waterworks Monona	WI1130245	PFHxSPFBAPFBSPFPeAPFHxA	8	8 detected	View
Rhinelander Water & Wastewater Rhinelander	WI7440126	PFOAPFHxAPFHpAPFPeA	14	14 detected	View
Mt Horeb Waterworks Mount Horeb	WI1130247	PFPeAPFHxS	4	4 detected	View
New London Waterworks New London	WI4690398	PFPeA	2	2 detected	View
Lake Geneva Utility Commission	WI2650066	PFHxSPFBSPFOA	11	11 detected	View
Town of Brookfield San Dist 4 Brookfield	WI2680239	PFBS	1	1 detected	View
Rib Mountain Water Utility	WI7370660	PFBSPFPeAPFBAPFHxSPFHxA+2	19	19 detected	View
Waupaca Waterworks Waupaca	WI4690402	PFBSPFOSPFBA	9	9 detected	View
Prairie Du Chien Waterworks Prairie Du Chien	WI6120250	PFHxSPFOS	3	3 detected	View
Slinger Water Utility Slinger	WI2670116	PFPeAPFHxAPFHxS	5	5 detected	View
Harrison Utilities - Fka Waverly Sd	WI4080076	PFBA	2	2 detected	View
East Troy Waterworks East Troy	WI2650123	PFBS	4	4 detected	View
Shawano Lk San Dist 1 Shawano	WI4590457	PFBA	1	1 detected	View
Sheboygan Tn Waterworks Sheboygan	WI4600403	PFHxAPFPeAPFHxSPFBS	8	8 detected	View
Medford Waterworks Medford	WI8610125	PFHxSPFBAPFOA	4	4 detected	View
Kewaskum Waterworks Kewaskum	WI2670112	PFOAPFBS	6	6 detected	View
Saukville Waterworks Saukville	WI2460134	PFPeSPFOSPFBSPFPeAPFHxA+4	28	28 detected	View
Prescott Waterworks Prescott	WI6480243	PFBAPFHxAPFOAPFHxSPFPeA+1	24	24 detected	View
Black River Falls Waterworks Black River Falls	WI6270244	PFBA	2	2 detected	View
Ellsworth Waterworks Ellsworth	WI6480239	PFBA	4	4 detected	View
Tomahawk Waterworks Tomahawk	WI7350127	PFHpAPFOAPFHxAPFPeAPFBA	20	20 detected	View
Schofield Waterworks Schofield	WI7370162	PFPeAPFBSPFHxSPFBAPFHxA+1	16	16 detected	View
Palmyra Waterworks Palmyra	WI1280112	PFOSPFHxS	3	3 detected	View

Source: EPA UCMR 5 Occurrence Data · Methodology

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