Wisconsin tap water quality
PFAS results for 202 Wisconsin water systems from EPA's latest nationwide testing. Enter your address for your own utility's record and a filter recommendation.
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202systems tested
26%had PFAS detected
21over EPA's 4 ppt limit
Highest PFAS levels in Wisconsin
| Water system | Max PFOA (ppt) | Max PFOS (ppt) |
|---|---|---|
| Prairie Du Chien Waterworks | — | 39 |
| Saukville Waterworks | 4.2 | 31 |
| Tomahawk Waterworks | 21 | — |
| Kewaskum Waterworks | 15 | — |
| Marshfield Utilities | — | 14 |
| Weston Municipal Utilities | 5.9 | 13 |
| Pewaukee City Water and Sewer Utility | 8.5 | 12 |
| Prescott Waterworks | 9.9 | — |
| Rib Mountain Sanitary Dist | 5.2 | 9.4 |
| Concor Tool & Machine INC | 8.5 | 6.7 |
All Wisconsin water systems
- Allouez Waterworks
- Appleton Waterworks
- Ashwaubenon Waterworks
- Baraboo Waterworks
- Beaver Dam Water Utility
- Bellevue Waterworks
- Brookfield Water Utility
- Brown Deer Waterworks
- Cedarburg L & W Commission
- Chippewa Falls Waterworks
- City of Beloit
- Cudahy Waterworks
- Darboy Sanitary Dist 1
- De Pere Water Department
- Eau Claire Waterworks
- Fitchburg Utility Dist 1
- Fond Du Lac Waterworks
- Fort Atkinson Waterworks
- Fox Crossing Utilities East-Formerly Menasha Tn of
- Fox Crossing Utilities West-Formerly Menasha Tn of
- Franklin Water Utility
- Germantown Water Utility
- Glendale Waterworks
- Grafton Waterworks
- Grand Chute Tn San Dist 1
- Green Bay Waterworks
- Greendale Waterworks
- Hartford Waterworks Wi ⚠
- Holmen Waterworks
- Howard Waterworks
- Hudson Waterworks
- Janesville Water Utility
- Kaukauna Utilities
- Kenosha Water Utility
- La Crosse Waterworks ⚠
- Little Chute Waterworks
- Madison Water Utility
- Manitowoc Waterworks
- Marinette Waterworks
- Marshfield Utilities ⚠
- Menasha Elec & Water Util
- Menomonee Falls Ww - Surface Water
- Menomonie Waterworks
- Mequon Water Utility
- Middleton Waterworks
- Milwaukee Waterworks
- Monroe Waterworks
- Neenah Waterworks
- New Berlin Water Utility
- North Shore Water Commission
- Oak Creek Waterworks
- Oconomowoc Waterworks
- Onalaska Waterworks
- Oregon Waterworks
- Oshkosh Waterworks
- Platteville Waterworks
- Pleasant Prairie Water Utility
- Plover Waterworks
- Port Washington Waterworks
- Portage Waterworks
- Racine Waterworks
- River Falls Waterworks
- Sheboygan Water Utilities
- Shorewood Waterworks
- South Milwaukee Waterworks
- Stevens Point Waterworks
- Stoughton Waterworks
- Sun Prairie Utilities
- Superior Water Light & Power Company
- Sussex Village Hall & Water Utility
- Two Rivers Waterworks
- Verona Waterworks
- Village of Caledonia Water Utility -
- Watertown Waterworks
- Waukesha Water Utility
- Waunakee Waterworks
- Wausau Waterworks
- Wauwatosa Waterworks
- West Allis Waterworks
- West Bend Waterworks ⚠
- Weston Municipal Utilities ⚠
- Whitefish Bay Waterworks
- Whitewater Waterworks
- Wis Rapids Water Works & Lighting Comm
- Altoona Waterworks
- Antigo Waterworks
- Arena Waterworks
- Ashland Water Utility
- Baldwin Waterworks
- Barron Light & Water Dept
- Berlin Waterworks
- Birds Eye Foods
- Black River Falls Waterworks
- Bloomer Waterworks
- Bloomington Waterworks
- Brillion Waterworks
- Burlington Waterworks
- Cabelas - Richfield
- Chilton Waterworks
- Clinton Waterworks Wi
- Clintonville Utilities
- Columbus Water & Light Department
- Combined Locks Waterworks
- Concor Tool & Machine INC ⚠
- Cottage Grove Waterworks
- Cross Plains Waterworks
- Deforest Waterworks
- Delavan Waterworks
- Denmark Waterworks
- Dodgeville Waterworks
- East Troy Waterworks
- Eau Galle Cheese Factory
- Edgerton Waterworks
- Elkhorn Waterworks
- Ellsworth Waterworks
- Evansville Waterworks
- Forest Junction Pub Util
- Fort Mccoy North Post
- Fox Point Waterworks
- Greenville Sanitary Dist
- Harrison Utilities - Fka Waverly Sd
- Hartland Waterworks ⚠
- Hilbert Waterworks
- Ho Chunk Casino
- Horicon Waterworks
- Jackson Waterworks
- Jefferson Waterworks
- Kewaskum Waterworks ⚠
- Kiel Waterworks
- Kimberly Waterworks
- Kronenwetter Water & Sewer Utility
- Lake Geneva Utility Commission ⚠
- Lake Mills Waterworks
- Lancaster Waterworks
- Lawrence Waterworks
- Ledgeview Tn Sanitary Dist 2
- Marshall Waterworks
- Mauston Green Acres
- Mauston Waterworks
- Mayville Waterworks
- Mcfarland Waterworks
- Medford Waterworks ⚠
- Merrill Waterworks
- Milton Waterworks
- Monona Waterworks
- Mt Horeb Waterworks
- Mt Zion Christian Church
- Mukwonago Waterworks
- Muskego Water Utility
- New Berlin West Middle High School
- New London Waterworks
- New Richmond Waterworks
- North Fond Du Lac Waterworks
- Oconto Waterworks
- Omro Waterworks
- Palmyra Waterworks ⚠
- Peshtigo Waterworks
- Pewaukee City Water and Sewer Utility ⚠
- Pewaukee Village Waterworks
- Plymouth Utilities
- Prairie Du Chien Waterworks ⚠
- Prairie Du Sac Waterworks
- Prescott Waterworks ⚠
- Pulaski Waterworks
- Reedsburg Waterworks
- Rhinelander Water & Wastewater ⚠
- Rib Mountain Sanitary Dist ⚠
- Rice Lake Waterworks
- Richland Center Waterworks
- Ripon Water Utility
- Sauk City Waterworks
- Saukville Waterworks ⚠
- Schofield Waterworks ⚠
- Schreiber Foods INC
- Seymour Waterworks
- Shawano Lk San Dist 1
- Shawano Waterworks
- Sheboygan Falls Utilities
- Sheboygan Tn Waterworks
- Shullsburg Waterworks
- Slinger Water Utility
- Somers Water Utility
- Sparta Waterworks
- St Edward Sch & Ch
- Stanley Waterworks
- Sturgeon Bay Waterworks ⚠
- Suamico Waterworks
- Tomah Waterworks
- Tomahawk Waterworks ⚠
- Town of Brookfield San Dist 4
- Union Grove Waterworks
- Village of Bloomfield
- Village of Lake Hallie Waterworks
- Viroqua Waterworks
- Waterford On the Bay
- Waterford Waterworks
- Waterloo Waterworks
- Waupaca Waterworks ⚠
- Waupun Correctional Inst
- Waupun Utilities
- West Salem Waterworks
- Yorkville Utility Dist 1
Questions
Does Wisconsin tap water have PFAS?
In EPA's UCMR 5 testing, 52 of 202 Wisconsin water systems (26%) had at least one PFAS compound detected, and 21 had PFOA or PFOS above EPA's 4 ppt limit.
What is the best water filter in Wisconsin?
It depends on your utility. Where PFAS is above EPA's limit, reverse osmosis is the most effective option. Where the main concern is lead from home plumbing or chlorine taste, a certified carbon filter is enough. Enter your address to get a match.