Official PFAS Records
Wisconsin PFAS Watchlist
Official EPA UCMR 5 PFAS monitoring records for public water systems in Wisconsin. 189 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.
189
Systems with records
35,479
Total records
428
Official detections
| Water System | Records | |
|---|---|---|
Milwaukee Waterworks Milwaukee | 232 | View |
Madison Water Utility Madison | 1160 | View |
Green Bay Waterworks Green Bay | 116 | View |
Racine Waterworks Racine | 116 | View |
Kenosha Water Utility Kenosha | 116 | View |
Appleton Waterworks Menasha | 116 | View |
Waukesha Water Utility Waukesha | 406 | View |
Eau Claire Waterworks Eau Claire | 58 | View |
Janesville Water Utility Janesville | 174 | View |
West Allis Waterworks West Allis | 116 | View |
Oshkosh Waterworks Oshkosh | 116 | View |
La Crosse Waterworks La Crosse | 580 | View |
Sheboygan Water Utilities Sheboygan | 116 | View |
Wauwatosa Waterworks Wauwatosa | 116 | View |
Fond Du Lac Waterworks Fond Du Lac | 232 | View |
Wausau Waterworks Wausau | 116 | View |
City of Beloit Beloit | 406 | View |
North Shore Water Commission Glendale | 116 | View |
Manitowoc Waterworks Manitowoc | 116 | View |
Sun Prairie Utilities Sun Prairie | 406 | View |
Oak Creek Waterworks Oak Creek | 116 | View |
West Bend Waterworks West Bend | 174 | View |
Brookfield Water Utility Brookfield | 986 | View |
New Berlin Water Utility New Berlin | 116 | View |
Neenah Waterworks Neenah | 116 | View |
Stevens Point Waterworks Stevens Point | 116 | View |
Superior Water Light & Power Company Superior | 116 | View |
De Pere Waterworks Sa 1 De Pere | 116 | View |
Fitchburg Utility Dist 1 Fitchburg | 232 | View |
Watertown Waterworks Watertown | 174 | View |
Middleton Waterworks Middleton | 348 | View |
Menomonee Falls Ww - Surface Water Menomonee Falls | 87 | View |
Franklin Water Utility Franklin | 116 | View |
Village of Caledonia Water Utility Caledonia | 232 | View |
Grand Chute Tn San Dist 1 Grand Chute | 116 | View |
South Milwaukee Waterworks South Milwaukee | 116 | View |
Howard Waterworks Green Bay | 232 | View |
Germantown Water Utility Germantown | 348 | View |
Wis Rapids Water Works & Lighting Comm Wisconsin Rapids | 58 | View |
Marshfield Utilities Marshfield | 174 | View |
Cudahy Waterworks Cudahy | 116 | View |
Hudson Waterworks Hudson | 406 | View |
Fox Crossing Utilities West Neenah | 232 | View |
Onalaska Waterworks Onalaska | 232 | View |
Ashwaubenon Waterworks Green Bay | 116 | View |
Kaukauna Utilities Kaukauna | 174 | View |
Bellevue Waterworks Green Bay | 116 | View |
Beaver Dam Water Utility Beaver Dam | 58 | View |
Weston Municipal Utilities Weston | 377 | View |
River Falls Waterworks River Falls | 290 | View |
Menomonie Waterworks Menomonie | 174 | View |
Oconomowoc Waterworks Oconomowoc | 232 | View |
Hartford Waterworks Hartford | 97 | View |
Menasha Elec & Water Util Menasha | 116 | View |
Waunakee Waterworks Waunakee | 232 | View |
Greendale Waterworks Greendale | 116 | View |
Whitefish Bay Waterworks Whitefish Bay | 116 | View |
Verona Waterworks Verona | 290 | View |
Whitewater Waterworks Whitewater | 290 | View |
Allouez Waterworks Green Bay | 116 | View |
Shorewood Waterworks Shorewood | 116 | View |
Plover Waterworks Plover | 60 | View |
Chippewa Falls Waterworks Chippewa Falls | 116 | View |
Stoughton Waterworks Stoughton | 232 | View |
Darboy Sanitary Dist 1 Appleton | 116 | View |
Glendale Waterworks Glendale | 116 | View |
Port Washington Waterworks Port Washington | 116 | View |
Brown Deer Waterworks Brown Deer | 116 | View |
Baraboo Waterworks Baraboo | 290 | View |
Fort Atkinson Waterworks Fort Atkinson | 232 | View |
Grafton Waterworks Grafton | 348 | View |
Platteville Waterworks Platteville | 174 | View |
Little Chute Waterworks Little Chute | 174 | View |
Cedarburg L & W Commission Cedarburg | 232 | View |
Sussex Village Hall & Water Utility Sussex | 232 | View |
Greenville Utilities Vil of Greenville | 232 | View |
Two Rivers Waterworks Two Rivers | 116 | View |
Oregon Waterworks Oregon | 174 | View |
Mequon Water Utility Mequon | 232 | View |
Marinette Waterworks Marinette | 116 | View |
Fox Crossing Utilities East Neenah | 174 | View |
New Richmond Waterworks New Richmond | 290 | View |
Monroe Waterworks Monroe | 290 | View |
Pleasant Prairie Water Utility Pleasant Prairie | 116 | View |
Deforest Waterworks Deforest | 232 | View |
Portage Waterworks Portage | 116 | View |
Elkhorn Waterworks Elkhorn | 145 | View |
Holmen Waterworks Holmen | 203 | View |
Sparta Waterworks Sparta | 290 | View |
Fort Mccoy North Post Fort Mccoy | 348 | View |
Reedsburg Waterworks Reedsburg | 290 | View |
Burlington Waterworks Burlington | 290 | View |
Sturgeon Bay Waterworks Sturgeon Bay | 290 | View |
Mcfarland Waterworks Mc Farland | 174 | View |
Merrill Waterworks Merrill | 116 | View |
Altoona Waterworks Altoona | 348 | View |
Shawano Waterworks Shawano | 174 | View |
Cottage Grove Waterworks Cottage Grove | 174 | View |
Hartland Waterworks Hartland | 290 | View |
Tomah Waterworks Tomah | 290 | View |
Rice Lake Waterworks Rice Lake | 232 | View |
Plymouth Utilities Plymouth | 406 | View |
Sheboygan Falls Utilities Sheboygan Falls | 116 | View |
Pewaukee City Water and Sewer Utility Pewaukee | 464 | View |
Monona Waterworks Monona | 87 | View |
Delavan Waterworks Delavan | 174 | View |
Rhinelander Water & Wastewater Rhinelander | 116 | View |
Mukwonago Waterworks Mukwonago | 116 | View |
Pewaukee Village Waterworks Pewaukee | 145 | View |
Muskego Water Utility Muskego | 464 | View |
Waupun Utilities Waupun | 58 | View |
Ashland Water Utility Ashland | 87 | View |
Jefferson Waterworks Jefferson | 174 | View |
Jackson Waterworks Jackson | 232 | View |
Antigo Waterworks Antigo | 58 | View |
Mt Horeb Waterworks Mount Horeb | 232 | View |
Ripon Water Utility Ripon | 232 | View |
Kimberly Waterworks Kimberly | 174 | View |
Ledgeview Tn Sanitary Dist 2 De Pere | 174 | View |
New London Waterworks New London | 406 | View |
Lake Geneva Utility Commission | 116 | View |
Kronenwetter Water & Sewer Utility Kronenwetter | 116 | View |
Fox Point Waterworks Fox Point | 116 | View |
Village of Lake Hallie Waterworks Chippewa Falls | 232 | View |
Town of Brookfield San Dist 4 Brookfield | 87 | View |
Rib Mountain Water Utility | 232 | View |
Lake Mills Waterworks | 174 | View |
Waupaca Waterworks Waupaca | 348 | View |
Prairie Du Chien Waterworks Prairie Du Chien | 87 | View |
Evansville Waterworks Evansville | 116 | View |
Slinger Water Utility Slinger | 174 | View |
Milton Waterworks Milton | 232 | View |
Berlin Waterworks Berlin | 174 | View |
Edgerton Waterworks Edgerton | 174 | View |
Harrison Utilities - Fka Waverly Sd | 87 | View |
North Fond Du Lac Waterworks North Fond Du Lac | 58 | View |
Lawrence Waterworks De Pere | 116 | View |
Waterford Waterworks Waterford | 174 | View |
Columbus Utilities Columbus | 116 | View |
Mayville Waterworks Mayville | 232 | View |
Richland Center Waterworks Richland Center | 174 | View |
East Troy Waterworks East Troy | 232 | View |
West Salem Waterworks West Salem | 174 | View |
Shawano Lk San Dist 1 Shawano | 174 | View |
Union Grove Waterworks | 174 | View |
Suamico Waterworks Suamico | 116 | View |
Clintonville Utilities Clintonville | 174 | View |
Oconto Waterworks Oconto | 87 | View |
Sheboygan Tn Waterworks Sheboygan | 174 | View |
Dodgeville Waterworks Dodgeville | 116 | View |
Mauston Waterworks Mauston | 87 | View |
Baldwin Waterworks Baldwin | 116 | View |
Viroqua Waterworks Viroqua | 174 | View |
Medford Waterworks Medford | 348 | View |
Kewaskum Waterworks Kewaskum | 232 | View |
Saukville Waterworks Saukville | 290 | View |
Prescott Waterworks Prescott | 116 | View |
Chilton Waterworks Chilton | 29 | View |
Cross Plains Waterworks Cross Plains | 174 | View |
Village of Bloomfield Pell Lake | 58 | View |
Pulaski Waterworks Pulaski | 116 | View |
Prairie Du Sac Waterworks Prairie Du Sac | 116 | View |
Kiel Waterworks Kiel | 232 | View |
Lancaster Waterworks Lancaster | 87 | View |
Marshall Waterworks Marshall | 174 | View |
Waupun Correctional Inst Waupun | 116 | View |
Horicon Waterworks Horicon | 174 | View |
Bloomer Waterworks Bloomer | 116 | View |
Omro Waterworks Omro | 174 | View |
Combined Locks Waterworks Combined Locks | 58 | View |
Black River Falls Waterworks Black River Falls | 232 | View |
Seymour Waterworks Seymour | 116 | View |
Waterloo Waterworks Waterloo | 87 | View |
Sauk City Waterworks Sauk City | 116 | View |
Stanley Waterworks Stanley | 174 | View |
Barron Light & Water Dept Barron | 232 | View |
Peshtigo Waterworks Peshtigo | 174 | View |
Ellsworth Waterworks Ellsworth | 174 | View |
Brillion Waterworks Brillion | 174 | View |
Tomahawk Waterworks Tomahawk | 116 | View |
Denmark Waterworks Denmark | 116 | View |
Schofield Waterworks Schofield | 116 | View |
Clinton Waterworks Clinton | 116 | View |
Somers Water Utility Somers | 87 | View |
Palmyra Waterworks Palmyra | 116 | View |
Shullsburg Waterworks Shullsburg | 116 | View |
Hilbert Waterworks Hilbert | 116 | View |
Arena Waterworks Arena | 58 | View |
Bloomington Waterworks Bloomington | 58 | View |
Source: EPA UCMR 5 Occurrence Data · Methodology