Wisconsin tap water quality
831 community water systems
7.2%
exceed lead action level
(60/828 systems)
(60/828 systems)
1.9%
PFOA/PFOS detected
(1/54 systems)
(1/54 systems)
Largest water systems
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that system.
| System | City | Population | Lead (p90) |
|---|---|---|---|
| MILWAUKEE WATERWORKS | MILWAUKEE | 626,000 | 0.0186 mg/L |
| GREEN BAY WATERWORKS | GREEN BAY | 107,369 | 0.0180 mg/L |
| RACINE WATERWORKS | RACINE | 105,100 | 0.0191 mg/L |
| KENOSHA WATER UTILITY | KENOSHA | 99,218 | 0.0086 mg/L |
| APPLETON WATERWORKS | MENASHA | 74,511 | 0.0059 mg/L |
| WEST ALLIS WATERWORKS | WEST ALLIS | 63,240 | 0.0110 mg/L |
| OSHKOSH WATERWORKS | OSHKOSH | 63,000 | 0.0129 mg/L |
| SHEBOYGAN WATER UTILITIES | SHEBOYGAN | 49,931 | 0.0124 mg/L |
| WAUWATOSA WATERWORKS | WAUWATOSA | 49,064 | 0.0186 mg/L |
| NORTH SHORE WATER COMMISSION | GLENDALE | 35,598 | 0.0219 mg/L |
| MANITOWOC WATERWORKS | MANITOWOC | 34,500 | 0.0145 mg/L |
| OAK CREEK WATERWORKS | OAK CREEK | 32,104 | 0.0116 mg/L |
| NEENAH WATERWORKS | NEENAH | 27,506 | 0.0204 mg/L |
| STEVENS POINT WATERWORKS | STEVENS POINT | 26,717 | 0.0085 mg/L |
| SUPERIOR WATER LIGHT & POWER COMPANY | SUPERIOR | 26,084 | 0.0144 mg/L |
| DE PERE WATERWORKS SA 1 | DE PERE | 25,660 | 0.0026 mg/L |
| FITCHBURG UTILITY DIST 1 | FITCHBURG | 24,500 | 0.0045 mg/L |
| WATERTOWN WATERWORKS | WATERTOWN | 23,945 | 0.0160 mg/L |
| MENOMONEE FALLS WW - SURFACE WATER | MENOMONEE FALLS | 23,867 | 0.0153 mg/L |
| FRANKLIN WATER UTILITY | FRANKLIN | 22,500 | 0.0090 mg/L |
| CALEDONIA WATER UTILITY - VILLAGE OF | CALEDONIA | 21,819 | 0.0048 mg/L |
| GRAND CHUTE TN SAN DIST 1 | GRAND CHUTE | 21,583 | 0.0100 mg/L |
| SOUTH MILWAUKEE WATERWORKS | SOUTH MILWAUKEE | 21,340 | 0.0131 mg/L |
| HOWARD WATERWORKS | GREEN BAY | 21,133 | 0.0030 mg/L |
| GERMANTOWN WATER UTILITY | GERMANTOWN | 20,027 | 0.0080 mg/L |
| MARSHFIELD UTILITIES | MARSHFIELD | 18,815 | 0.0150 mg/L |
| CUDAHY WATERWORKS | CUDAHY | 18,659 | 0.0142 mg/L |
| ONALASKA WATERWORKS | ONALASKA | 18,000 | 0.0029 mg/L |
| ASHWAUBENON WATERWORKS | GREEN BAY | 17,730 | 0.0037 mg/L |
| BELLEVUE WATERWORKS | GREEN BAY | 16,715 | 0.0080 mg/L |
| BEAVER DAM WATER UTILITY | BEAVER DAM | 16,200 | 0.0207 mg/L |
| RIVER FALLS WATERWORKS | RIVER FALLS | 16,000 | 0.0038 mg/L |
| HARTFORD WATERWORKS | HARTFORD | 15,805 | 0.0118 mg/L |
| MENASHA ELEC & WATER UTIL | MENASHA | 15,144 | 0.0164 mg/L |
| GREENDALE WATERWORKS | GREENDALE | 14,393 | 0.0066 mg/L |
| WHITEFISH BAY WATERWORKS | WHITEFISH BAY | 14,272 | 0.0069 mg/L |
| VERONA WATERWORKS | VERONA | 14,030 | 0.0091 mg/L |
| FOX CROSSING UTILITIES WEST | NEENAH | 14,000 | 0.0040 mg/L |
| WHITEWATER WATERWORKS | WHITEWATER | 14,000 | 0.0145 mg/L |
| ALLOUEZ WATERWORKS | GREEN BAY | 13,923 | 0.0060 mg/L |
| SHOREWOOD WATERWORKS | SHOREWOOD | 13,535 | 0.0146 mg/L |
| PLOVER WATERWORKS | PLOVER | 13,486 | 0.0117 mg/L |
| STOUGHTON WATERWORKS | STOUGHTON | 13,078 | 0.0170 mg/L |
| DARBOY SANITARY DIST 1 | APPLETON | 13,024 | 0.0019 mg/L |
| GLENDALE WATERWORKS | GLENDALE | 12,883 | 0.0047 mg/L |
| PORT WASHINGTON WATERWORKS | PORT WASHINGTON | 12,853 | 0.0128 mg/L |
| BROWN DEER WATERWORKS | BROWN DEER | 12,741 | 0.0075 mg/L |
| BARABOO WATERWORKS | BARABOO | 12,703 | 0.0115 mg/L |
| CEDARBURG L & W COMMISSION | CEDARBURG | 12,500 | 0.0110 mg/L |
| GRAFTON WATERWORKS | GRAFTON | 12,269 | 0.0071 mg/L |
| PLATTEVILLE WATERWORKS | PLATTEVILLE | 12,268 | 0.0118 mg/L |
| GREENVILLE UTILITIES VIL OF | GREENVILLE | 11,340 | 0.0119 mg/L |
| TWO RIVERS WATERWORKS | TWO RIVERS | 11,270 | 0.0170 mg/L |
| OREGON WATERWORKS | OREGON | 11,200 | 0.0106 mg/L |
| MEQUON WATER UTILITY | MEQUON | 11,152 | 0.0111 mg/L |
| BURLINGTON WATERWORKS | BURLINGTON | 11,043 | 0.0132 mg/L |
| MARINETTE WATERWORKS | MARINETTE | 10,968 | 0.0067 mg/L |
| FOX CROSSING UTILITIES EAST | NEENAH | 10,927 | 0.0051 mg/L |
| NEW RICHMOND WATERWORKS | NEW RICHMOND | 10,824 | 0.0105 mg/L |
| MONROE WATERWORKS | MONROE | 10,780 | 0.0138 mg/L |
| PLEASANT PRAIRIE WATER UTILITY | PLEASANT PRAIRIE | 10,754 | 0.0116 mg/L |
| PORTAGE WATERWORKS | PORTAGE | 10,437 | 0.0054 mg/L |
| ELKHORN WATERWORKS | ELKHORN | 10,317 | 0.0452 mg/L |
| STURGEON BAY WATERWORKS | STURGEON BAY | 9,700 | 0.0133 mg/L |
| MCFARLAND WATERWORKS | MC FARLAND | 9,676 | 0.0075 mg/L |
| MERRILL WATERWORKS | MERRILL | 9,661 | 0.0102 mg/L |
| ALTOONA WATERWORKS | ALTOONA | 9,627 | 0.0054 mg/L |
| SHAWANO WATERWORKS | SHAWANO | 9,610 | 0.0143 mg/L |
| COTTAGE GROVE WATERWORKS | COTTAGE GROVE | 9,345 | 0.0106 mg/L |
| HARTLAND WATERWORKS | HARTLAND | 9,212 | 0.0135 mg/L |
| DELAVAN WATERWORKS | DELAVAN | 9,028 | 0.0099 mg/L |
| RICE LAKE WATERWORKS | RICE LAKE | 9,012 | 0.0036 mg/L |
| PLYMOUTH UTILITIES | PLYMOUTH | 8,964 | 0.0208 mg/L |
| SHEBOYGAN FALLS UTILITIES | SHEBOYGAN FALLS | 8,687 | 0.0090 mg/L |
| PEWAUKEE CITY WATER AND SEWER UTILITY | PEWAUKEE | 8,671 | 0.0089 mg/L |
| MONONA WATERWORKS | MONONA | 8,624 | 0.0073 mg/L |
| RHINELANDER WATER & WASTEWATER | RHINELANDER | 8,234 | 0.0037 mg/L |
| PEWAUKEE VILLAGE WATERWORKS | PEWAUKEE | 8,166 | 0.0089 mg/L |
| WAUPUN UTILITIES | WAUPUN | 8,056 | 0.0052 mg/L |
| ASHLAND WATER UTILITY | ASHLAND | 8,000 | 0.0417 mg/L |
| JEFFERSON WATERWORKS | JEFFERSON | 7,926 | 0.0224 mg/L |
| JACKSON WATERWORKS | JACKSON | 7,844 | 0.0072 mg/L |
| ANTIGO WATERWORKS | ANTIGO | 7,780 | 0.0114 mg/L |
| MT HOREB WATERWORKS | MOUNT HOREB | 7,756 | 0.0154 mg/L |
| KIMBERLY WATERWORKS | KIMBERLY | 7,608 | 0.0094 mg/L |
| LEDGEVIEW TN SANITARY DIST 2 | DE PERE | 7,602 | 0.0055 mg/L |
| NEW LONDON WATERWORKS | NEW LONDON | 7,187 | 0.0124 mg/L |
| KRONENWETTER WATER & SEWER UTILITY | KRONENWETTER | 6,931 | 0.0027 mg/L |
| FOX POINT WATERWORKS | FOX POINT | 6,808 | 0.0111 mg/L |
| LAKE HALLIE WATERWORKS VILLAGE OF | CHIPPEWA FALLS | 6,701 | 0.0049 mg/L |
| TOWN OF BROOKFIELD SAN DIST 4 | BROOKFIELD | 6,419 | 0.0114 mg/L |
| RIB MOUNTAIN WATER UTILITY | WAUSAU | 6,398 | 0.0089 mg/L |
| LAKE MILLS WATERWORKS | LAKE MILLS | 6,211 | 0.1010 mg/L |
| SLINGER WATER UTILITY | SLINGER | 5,659 | 0.0117 mg/L |
| MILTON WATERWORKS | MILTON | 5,588 | 0.0114 mg/L |
| BERLIN WATERWORKS | BERLIN | 5,524 | 0.0150 mg/L |
| EDGERTON WATERWORKS | EDGERTON | 5,512 | 0.0156 mg/L |
| HARRISON UTILITIES - FKA WAVERLY SD | MENASHA | 5,500 | 0.0055 mg/L |
| NORTH FOND DU LAC WATERWORKS | NORTH FOND DU LAC | 5,414 | 0.0152 mg/L |
| LAWRENCE WATERWORKS | DE PERE | 5,398 | 0.0047 mg/L |