PlainWater

Public Water Systems

10,988 active public water systems in WI, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

Population Violations Health Violations Name
System Name Location Population Violations PFAS
Menomonie Waterworks Menomonie, WI 15,950 468 Clean
Hartford Waterworks Hartford, WI 15,805 258 Detected
Oconomowoc Waterworks Oconomowoc, WI 15,805 26 Detected
Menasha Elec & Water Util Menasha, WI 15,144 18 Clean
Waunakee Waterworks Waunakee, WI 14,879 35 Clean
Greendale Waterworks Greendale, WI 14,393 19 Clean
Whitefish Bay Waterworks Milwaukee, WI 14,272 15 Clean
Allouez Waterworks Green Bay, WI 14,156 158 Clean
Verona Waterworks Verona, WI 14,030 28 Detected
Whitewater Waterworks Whitewater, WI 14,000 135 Clean
Shorewood Waterworks Shorewood, WI 13,535 30 Clean
Plover Waterworks Plover, WI 13,486 13 Detected
Chippewa Falls Waterworks Chippewa Falls, WI 13,375 284 Detected
Stoughton Waterworks Stoughton, WI 13,078 10 Detected
Darboy Sanitary Dist 1 Appleton, WI 13,024 9 Clean
Glendale Waterworks Glendale, WI 12,883 5 Clean
Port Washington Waterworks Port Washington, WI 12,853 38 Clean
Brown Deer Waterworks Brown Deer, WI 12,741 80 Clean
Baraboo Waterworks Baraboo, WI 12,703 366 Clean
Fort Atkinson Waterworks Fort Atkinson, WI 12,390 30 Clean
Grafton Waterworks Grafton, WI 12,269 237 Clean
Platteville Waterworks Platteville, WI 12,268 111 Clean
Little Chute Waterworks Little Chute, WI 12,168 99 Clean
Cedarburg L & W Commission Cedarburg, WI 11,800 107 Clean
Sussex Village Hall & Water Utility Sussex, WI 11,750 1,254 Clean
Greenville Utilities Vil Of Greenville, WI 11,340 100 Clean
Two Rivers Waterworks Two Rivers, WI 11,270 298 Clean
Oregon Waterworks Oregon, WI 11,200 47 Clean
Mequon Water Utility Mequon, WI 11,152 91 Clean
Marinette Waterworks Marinette, WI 10,968 55 Clean
Fox Crossing Utilities East Neenah, WI 10,927 7 Clean
New Richmond Waterworks New Richmond, WI 10,824 52 Detected
Monroe Waterworks Monroe, WI 10,780 35 Clean
Pleasant Prairie Water Utility Pleasant Prairie, WI 10,754 71 Clean
Deforest Waterworks Deforest, WI 10,500 20 Clean
Portage Waterworks Portage, WI 10,437 139 Detected
Elkhorn Waterworks Elkhorn, WI 10,317 291 Clean
Holmen Waterworks Holmen, WI 10,147 123 Detected
Sparta Waterworks Sparta, WI 10,025 24 Clean
Fort McCoy North Post Fort McCoy, WI 10,000 262 Clean
Reedsburg Waterworks Reedsburg, WI 9,984 36 Detected
Burlington Waterworks Burlington, WI 9,958 504 Clean
Sturgeon Bay Waterworks Sturgeon Bay, WI 9,700 12 Detected
McFarland Waterworks McFarland, WI 9,676 29 Detected
Merrill Waterworks Merrill, WI 9,661 228 Clean
Altoona Waterworks Altoona, WI 9,627 292 Clean
Cottage Grove Waterworks Cottage Grove, WI 9,345 19 Clean
Hartland Waterworks Hartland, WI 9,212 21 Detected
Shawano Waterworks Shawano, WI 9,200 27 Clean
Tomah Waterworks Tomah, WI 9,192 127 Detected
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