PFAS in Wisconsin Water
Based on EPA UCMR 5 testing of 78 public water systems in Wisconsin.
78
Systems Tested
78
With PFAS Detected
23
Above EPA Limits
29%
Exceed MCL
Most Commonly Detected PFAS in Wisconsin
Systems with detections · EPA UCMR 5 (2023–2025)
lithium 31 systems
PFHxS 27 systems
PFBS 26 systems
PFBA 24 systems
PFPeA 19 systems
PFHxA 17 systems
Check your Wisconsin ZIP code
Get specific results for your neighborhood's water utility.
Water Systems in Wisconsin (78)
Click any row to see ZIP-level details| Water System | PWSID | PFAS Detected | Above MCL | Risk |
|---|---|---|---|---|
| PEWAUKEE CITY WATER AND SEWER UTILITY Groundwater | WI2680214 | 11 | 3 | High Risk |
| SAUKVILLE WATERWORKS Groundwater | WI2460134 | 9 | 3 | High Risk |
| WESTON MUNICIPAL UTILITIES Groundwater | WI7370163 | 8 | 2 | High Risk |
| HARTLAND WATERWORKS Groundwater | WI2680205 | 7 | 2 | High Risk |
| LA CROSSE WATERWORKS Groundwater | WI6320309 | 7 | 2 | High Risk |
| RIB MOUNTAIN SANITARY DIST Groundwater | WI7370660 | 7 | 2 | High Risk |
| MARSHFIELD UTILITIES Groundwater | WI7720165 | 7 | 2 | High Risk |
| PRESCOTT WATERWORKS Groundwater | WI6480243 | 6 | 2 | High Risk |
| HARTFORD WATERWORKS, WI Groundwater | WI2670110 | 4 | 2 | High Risk |
| CONCOR TOOL & MACHINE INC Groundwater | WI8581084 | 4 | 2 | High Risk |
| STURGEON BAY WATERWORKS Groundwater | WI4150526 | 2 | 2 | High Risk |
| SCHOFIELD WATERWORKS Groundwater | WI7370162 | 6 | 1 | High Risk |
| SHEBOYGAN TN WATERWORKS Groundwater | WI4600403 | 5 | 1 | High Risk |
| TOMAHAWK WATERWORKS Groundwater | WI7350127 | 5 | 1 | High Risk |
| RHINELANDER WATER & WASTEWATER Groundwater | WI7440126 | 4 | 1 | High Risk |
| LAKE GENEVA UTILITY COMMISSION Groundwater | WI2650066 | 3 | 1 | High Risk |
| WAUPACA WATERWORKS Groundwater | WI4690402 | 3 | 1 | High Risk |
| MEDFORD WATERWORKS Groundwater | WI8610125 | 3 | 1 | High Risk |
| PALMYRA WATERWORKS Groundwater | WI1280112 | 2 | 1 | High Risk |
| KEWASKUM WATERWORKS Groundwater | WI2670112 | 2 | 1 | High Risk |
| WEST BEND WATERWORKS Groundwater | WI2670120 | 2 | 1 | High Risk |
| PRAIRIE DU CHIEN WATERWORKS Groundwater | WI6120250 | 2 | 1 | High Risk |
| EAU CLAIRE WATERWORKS Groundwater | WI6180230 | 2 | 1 | High Risk |
| MONONA WATERWORKS Groundwater | WI1130245 | 5 | 0 | Moderate |
| BROOKFIELD WATER UTILITY Groundwater | WI2680253 | 5 | 0 | Moderate |
| SLINGER WATER UTILITY Groundwater | WI2670116 | 3 | 0 | Low Level |
| TOMAH WATERWORKS Groundwater | WI6420254 | 3 | 0 | Low Level |
| MADISON WATER UTILITY Groundwater | WI1130224 | 2 | 0 | Low Level |
| MT HOREB WATERWORKS Groundwater | WI1130247 | 2 | 0 | Low Level |
| OCONOMOWOC WATERWORKS Groundwater | WI2680227 | 2 | 0 | Low Level |
| HUDSON WATERWORKS Groundwater | WI6560087 | 2 | 0 | Low Level |
| PORTAGE WATERWORKS Groundwater | WI1110039 | 1 | 0 | Low Level |
| STOUGHTON WATERWORKS Groundwater | WI1130078 | 1 | 0 | Low Level |
| MCFARLAND WATERWORKS Groundwater | WI1130241 | 1 | 0 | Low Level |
| VERONA WATERWORKS Groundwater | WI1130259 | 1 | 0 | Low Level |
| MAYVILLE WATERWORKS Groundwater | WI1140057 | 1 | 0 | Low Level |
| BELOIT CITY OF Groundwater | WI1540112 | 1 | 0 | Low Level |
| REEDSBURG WATERWORKS Groundwater | WI1570102 | 1 | 0 | Low Level |
| CEDARBURG L & W COMMISSION Groundwater | WI2460108 | 1 | 0 | Low Level |
| GRAFTON WATERWORKS Groundwater | WI2460111 | 1 | 0 | Low Level |
| UNION GROVE WATERWORKS Groundwater | WI2520200 | 1 | 0 | Low Level |
| WATERFORD WATERWORKS Groundwater | WI2520202 | 1 | 0 | Low Level |
| YORKVILLE UTILITY DIST 1 Groundwater | WI2521735 | 1 | 0 | Low Level |
| EAST TROY WATERWORKS Groundwater | WI2650123 | 1 | 0 | Low Level |
| MT ZION CHRISTIAN CHURCH Groundwater | WI2650822 | 1 | 0 | Low Level |
| GERMANTOWN WATER UTILITY Groundwater | WI2670105 | 1 | 0 | Low Level |
| JACKSON WATERWORKS Groundwater | WI2670111 | 1 | 0 | Low Level |
| SUSSEX VILLAGE HALL & WATER UTILITY Groundwater | WI2680233 | 1 | 0 | Low Level |
| TOWN OF BROOKFIELD SAN DIST 4 Groundwater | WI2680239 | 1 | 0 | Low Level |
| NEW BERLIN WEST MIDDLE HIGH SCHOOL Groundwater | WI2680813 | 1 | 0 | Low Level |
| MUSKEGO WATER UTILITY Groundwater | WI2681741 | 1 | 0 | Low Level |
| SUAMICO WATERWORKS Groundwater | WI4051031 | 1 | 0 | Low Level |
| LEDGEVIEW TN SANITARY DIST 2 Groundwater | WI4051418 | 1 | 0 | Low Level |
| HARRISON UTILITIES - FKA WAVERLY SD Surface Water | WI4080076 | 1 | 0 | Low Level |
| HILBERT WATERWORKS Groundwater | WI4080269 | 1 | 0 | Low Level |
| FOREST JUNCTION PUB UTIL Groundwater | WI4080377 | 1 | 0 | Low Level |
| NORTH FOND DU LAC WATERWORKS Groundwater | WI4200405 | 1 | 0 | Low Level |
| FOND DU LAC WATERWORKS Groundwater | WI4200469 | 1 | 0 | Low Level |
| PESHTIGO WATERWORKS Groundwater | WI4380442 | 1 | 0 | Low Level |
| OCONTO WATERWORKS Groundwater | WI4430495 | 1 | 0 | Low Level |
| DARBOY SANITARY DIST 1 Groundwater | WI4450117 | 1 | 0 | Low Level |
| APPLETON WATERWORKS Surface Water | WI4450333 | 1 | 0 | Low Level |
| KAUKAUNA UTILITIES Groundwater | WI4450336 | 1 | 0 | Low Level |
| LITTLE CHUTE WATERWORKS Groundwater | WI4450338 | 1 | 0 | Low Level |
| KIMBERLY WATERWORKS Groundwater | WI4450342 | 1 | 0 | Low Level |
| COMBINED LOCKS WATERWORKS Groundwater | WI4450409 | 1 | 0 | Low Level |
| ST EDWARD SCH & CH Groundwater | WI4450623 | 1 | 0 | Low Level |
| SHAWANO LK SAN DIST 1 Groundwater | WI4590457 | 1 | 0 | Low Level |
| NEW LONDON WATERWORKS Groundwater | WI4690398 | 1 | 0 | Low Level |
| RICE LAKE WATERWORKS Groundwater | WI6030138 | 1 | 0 | Low Level |
| CHIPPEWA FALLS WATERWORKS Groundwater | WI6090456 | 1 | 0 | Low Level |
| BLACK RIVER FALLS WATERWORKS Groundwater | WI6270244 | 1 | 0 | Low Level |
| HOLMEN WATERWORKS Groundwater | WI6320306 | 1 | 0 | Low Level |
| ONALASKA WATERWORKS Groundwater | WI6320327 | 1 | 0 | Low Level |
| ELLSWORTH WATERWORKS Groundwater | WI6480239 | 1 | 0 | Low Level |
| NEW RICHMOND WATERWORKS Groundwater | WI6560126 | 1 | 0 | Low Level |
| WAUSAU WATERWORKS Groundwater | WI7370102 | 1 | 0 | Low Level |
| PLOVER WATERWORKS Groundwater | WI7500726 | 1 | 0 | Low Level |