What is PFAS?
Water suppliers
PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS
are highlighted and listed first. “Not detected” means the contaminant was measured but
not found.
| Supplier | City | Population | PFAS (ug/L) |
|---|---|---|---|
| Palmyra Waterworks | Palmyra | 1,756 | 0.0062 µg/L |
| Milwaukee Waterworks | Milwaukee | 626,000 | Not detected |
| Kenosha Water Utility | Kenosha | 99,218 | Not detected |
| West Allis Waterworks | West Allis | 63,240 | Not detected |
| Wauwatosa Waterworks | Wauwatosa | 49,064 | Not detected |
| North Shore Water Commission | Glendale | 35,598 | Not detected |
| Oak Creek Waterworks | Oak Creek | 32,104 | Not detected |
| Fitchburg Utility Dist 1 | Fitchburg | 24,500 | Not detected |
| Watertown Waterworks | Watertown | 23,945 | Not detected |
| Franklin Water Utility | Franklin | 22,500 | Not detected |
| South Milwaukee Waterworks | South Milwaukee | 21,340 | Not detected |
| Cudahy Waterworks | Cudahy | 18,659 | Not detected |
| Beaver Dam Water Utility | Beaver Dam | 16,200 | Not detected |
| Greendale Waterworks | Greendale | 14,393 | Not detected |
| Whitefish Bay Waterworks | Whitefish Bay | 14,272 | Not detected |
| Verona Waterworks | Verona | 14,030 | Not detected |
| Shorewood Waterworks | Shorewood | 13,535 | Not detected |
| Stoughton Waterworks | Stoughton | 13,078 | Not detected |
| Glendale Waterworks | Glendale | 12,883 | Not detected |
| Brown Deer Waterworks | Brown Deer | 12,741 | Not detected |
| Baraboo Waterworks | Baraboo | 12,703 | Not detected |
| Platteville Waterworks | Platteville | 12,268 | Not detected |
| Oregon Waterworks | Oregon | 11,200 | Not detected |
| Monroe Waterworks | Monroe | 10,780 | Not detected |
| Pleasant Prairie Water Utility | Pleasant Prairie | 10,754 | Not detected |
| Portage Waterworks | Portage | 10,437 | Not detected |
| Mcfarland Waterworks | Mc Farland | 9,676 | Not detected |
| Cottage Grove Waterworks | Cottage Grove | 9,345 | Not detected |
| Monona Waterworks | Monona | 8,624 | Not detected |
| Waupun Utilities | Waupun | 8,056 | Not detected |
| Jefferson Waterworks | Jefferson | 7,926 | Not detected |
| Mt Horeb Waterworks | Mount Horeb | 7,756 | Not detected |
| Fox Point Waterworks | Fox Point | 6,808 | Not detected |
| Lake Mills Waterworks | Lake Mills | 6,211 | Not detected |
| Milton Waterworks | Milton | 5,588 | Not detected |
| Edgerton Waterworks | Edgerton | 5,512 | Not detected |
| Richland Center Waterworks | Richland Center | 5,100 | Not detected |
| Dodgeville Waterworks | Dodgeville | 4,583 | Not detected |
| Oneida #1 Or Site #1 | Oneida | 4,393 | Not detected |
| Cross Plains Waterworks | Cross Plains | 4,100 | Not detected |
| Keshena | Keshena | 3,960 | Not detected |
| Lancaster Waterworks | Lancaster | 3,907 | Not detected |
| Marshall Waterworks | Marshall | 3,862 | Not detected |
| Waupun Correctional Inst | Waupun | 3,706 | Not detected |
| Horicon Waterworks | Horicon | 3,682 | Not detected |
| Waterloo Waterworks | Waterloo | 3,520 | Not detected |
| Sauk City Waterworks | Sauk City | 3,518 | Not detected |
| Lac Du Flambeau | Lac Du Flambeau | 2,962 | Not detected |
| South-Central Water System | Bowler | 2,805 | Not detected |
| Clinton Waterworks | Clinton | 2,119 | Not detected |
| Somers Water Utility | Somers | 1,930 | Not detected |
| Shullsburg Waterworks | Shullsburg | 1,222 | Not detected |
| Arena Waterworks | Arena | 877 | Not detected |
| Bloomington Waterworks | Bloomington | 682 | Not detected |