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Wisconsin Tap Water Quality

EPA water quality data for 150 community water systems serving 772,077+ people in Wisconsin. Click any system to see violations, lead testing results, and a safety grade.

MADISON WATER UTILITY MADISON, WI · 272,000 people · Groundwater BELOIT CITY OF BELOIT, WI · 36,677 people · Groundwater SUN PRAIRIE UTILITIES SUN PRAIRIE, WI · 33,966 people · Groundwater FITCHBURG UTILITY DIST 1 FITCHBURG, WI · 24,500 people · Groundwater WATERTOWN WATERWORKS WATERTOWN, WI · 23,945 people · Groundwater MIDDLETON WATERWORKS MIDDLETON, WI · 23,868 people · Groundwater BEAVER DAM WATER UTILITY BEAVER DAM, WI · 16,200 people · Groundwater WAUNAKEE WATERWORKS WAUNAKEE, WI · 14,879 people · Groundwater VERONA WATERWORKS VERONA, WI · 14,030 people · Groundwater STOUGHTON WATERWORKS STOUGHTON, WI · 13,078 people · Groundwater FORT ATKINSON WATERWORKS FORT ATKINSON, WI · 12,390 people · Groundwater PLATTEVILLE WATERWORKS PLATTEVILLE, WI · 12,268 people · Groundwater OREGON WATERWORKS OREGON, WI · 11,200 people · Groundwater MONROE WATERWORKS MONROE, WI · 10,780 people · Groundwater DEFOREST WATERWORKS DEFOREST, WI · 10,500 people · Groundwater PORTAGE WATERWORKS PORTAGE, WI · 10,437 people · Groundwater MCFARLAND WATERWORKS MCFARLAND, WI · 9,676 people · Groundwater COTTAGE GROVE WATERWORKS COTTAGE GROVE, WI · 9,345 people · Groundwater MONONA WATERWORKS MONONA, WI · 8,624 people · Groundwater WAUPUN UTILITIES WAUPUN, WI · 8,056 people · Groundwater JEFFERSON WATERWORKS JEFFERSON, WI · 7,926 people · Groundwater MT HOREB WATERWORKS MOUNT HOREB, WI · 7,756 people · Groundwater LAKE MILLS WATERWORKS LAKE MILLS, WI · 6,211 people · Groundwater EVANSVILLE WATERWORKS EVANSVILLE, WI · 5,703 people · Groundwater EDGERTON WATERWORKS EDGERTON, WI · 5,512 people · Groundwater COLUMBUS UTILITIES COLUMBUS, WI · 5,173 people · Groundwater MAYVILLE WATERWORKS MAYVILLE, WI · 5,112 people · Groundwater RICHLAND CENTER WATERWORKS RICHLAND CENTER, WI · 5,100 people · Groundwater WINDSOR WATER UTILITY SOUTH WINDSOR, WI · 4,607 people · Groundwater DODGEVILLE WATERWORKS DODGEVILLE, WI · 4,583 people · Groundwater CROSS PLAINS WATERWORKS CROSS PLAINS, WI · 4,100 people · Groundwater LANCASTER WATERWORKS LANCASTER, WI · 3,868 people · Groundwater MARSHALL WATERWORKS MARSHALL, WI · 3,862 people · Groundwater WAUPUN CORRECTIONAL INST MADISON, WI · 3,706 people · Groundwater HORICON WATERWORKS HORICON, WI · 3,682 people · Groundwater WATERLOO WATERWORKS WATERLOO, WI · 3,520 people · Groundwater JOHNSON CREEK WATERWORKS JOHNSON CREEK, WI · 3,318 people · Groundwater BOSCOBEL WATERWORKS BOSCOBEL, WI · 3,237 people · Groundwater WISCONSIN DELLS WATERWORKS WISCONSIN DELLS, WI · 3,232 people · Groundwater BRODHEAD WATERWORKS BRODHEAD, WI · 3,216 people · Groundwater LODI WATERWORKS LODI, WI · 3,146 people · Groundwater MENDOTA MENTAL HEALTH INST MADISON, WI · 2,787 people · Groundwater BELLEVILLE WATERWORKS BELLEVILLE, WI · 2,712 people · Groundwater LOMIRA WATERWORKS LOMIRA, WI · 2,701 people · Groundwater JUNEAU WATERWORKS JUNEAU, WI · 2,627 people · Groundwater POYNETTE WATERWORKS POYNETTE, WI · 2,520 people · Groundwater DEERFIELD WATERWORKS DEERFIELD, WI · 2,510 people · Groundwater FENNIMORE WATERWORKS FENNIMORE, WI · 2,507 people · Groundwater MINERAL POINT WATERWORKS MINERAL POINT, WI · 2,487 people · Groundwater NEW GLARUS WATERWORKS NEW GLARUS, WI · 2,348 people · Groundwater DARLINGTON WATERWORKS DARLINGTON, WI · 2,235 people · Groundwater PARDEEVILLE WATERWORKS PARDEEVILLE, WI · 2,151 people · Groundwater CUBA CITY WATERWORKS CUBA CITY, WI · 2,141 people · Groundwater CLINTON WATERWORKS CLINTON, WI · 2,119 people · Groundwater HARMONY GROVE SAN DIST LODI, WI · 1,950 people · Groundwater FOX LAKE CORRECTIONAL INSTITUTION MADISON, WI · 1,850 people · Groundwater RANDOLPH WATER DEPT RANDOLPH, WI · 1,800 people · Groundwater FALL RIVER WATERWORKS FALL RIVER, WI · 1,793 people · Groundwater PALMYRA WATERWORKS PALMYRA, WI · 1,756 people · Groundwater MAZOMANIE WATERWORKS MAZOMANIE, WI · 1,744 people · Groundwater SHOREWOOD HILLS WATERWORKS MADISON, WI · 1,670 people · Groundwater Purchased CAMBRIDGE WATER & SEWER UTILITY CAMBRIDGE, WI · 1,638 people · Groundwater FOX LAKE WATERWORKS FOX LAKE, WI · 1,610 people · Groundwater BROOKLYN WATERWORKS BROOKLYN, WI · 1,524 people · Groundwater BLACK EARTH WATERWORKS BLACK EARTH, WI · 1,493 people · Groundwater MUSCODA WATERWORKS MUSCODA, WI · 1,453 people · Groundwater MAPLE BLUFF WATERWORKS MADISON, WI · 1,342 people · Groundwater Purchased THERESA WATERWORKS THERESA, WI · 1,262 people · Groundwater BARNEVELD WATERWORKS BARNEVELD, WI · 1,258 people · Groundwater SHULLSBURG WATERWORKS SHULLSBURG, WI · 1,222 people · Groundwater MONTICELLO WATERWORKS MONTICELLO, WI · 1,217 people · Groundwater HAZEL GREEN WATERWORKS HAZEL GREEN, WI · 1,193 people · Groundwater DANE WATERWORKS DANE, WI · 1,117 people · Groundwater OAKHILL CORRECTIONAL INST OREGON, WI · 1,096 people · Groundwater RIO WATERWORKS RIO, WI · 1,095 people · Groundwater DICKEYVILLE WATERWORKS DICKEYVILLE, WI · 1,069 people · Groundwater HUSTISFORD WATERWORKS HUSTISFORD, WI · 1,063 people · Groundwater ALBANY WATERWORKS ALBANY, WI · 1,018 people · Groundwater BELMONT WATERWORKS BELMONT, WI · 991 people · Groundwater BENTON WATERWORKS BENTON, WI · 976 people · Groundwater BLUE MOUNDS WATERWORKS BLUE MOUNDS, WI · 950 people · Groundwater IRON RIDGE WATERWORKS IRON RIDGE, WI · 937 people · Groundwater LONE ROCK WATERWORKS LONE ROCK, WI · 895 people · Groundwater ARENA WATERWORKS ARENA, WI · 877 people · Groundwater HIGHLAND WATERWORKS HIGHLAND, WI · 842 people · Groundwater ARLINGTON WATERWORKS ARLINGTON, WI · 823 people · Groundwater ARGYLE WATERWORKS ARGYLE, WI · 823 people · Groundwater BLANCHARDVILLE WATERWORKS BLANCHARDVILLE, WI · 810 people · Groundwater WESTPORT WATER UTILITY WAUNAKEE, WI · 800 people · Groundwater CASSVILLE WATERWORKS CASSVILLE, WI · 777 people · Groundwater WYOCENA WATERWORKS WYOCENA, WI · 768 people · Groundwater CAMBRIA WATERWORKS Cambria, WI · 767 people · Groundwater CRYSTAL LAKE RV RESORT LLC LODI, WI · 725 people · Groundwater REESEVILLE WATERWORKS REESEVILLE, WI · 718 people · Groundwater MONTFORT WATERWORKS MONTFORT, WI · 718 people · Groundwater POTOSI WATERWORKS POTOSI, WI · 718 people · Groundwater SADDLE RIDGE ESTATES PORTAGE, WI · 700 people · Groundwater RIDGEWAY WATERWORKS RIDGEWAY, WI · 690 people · Groundwater BLOOMINGTON WATERWORKS BLOOMINGTON, WI · 682 people · Groundwater LIVINGSTON WATERWORKS LIVINGSTON, WI · 664 people · Groundwater AVOCA WATERWORKS AVOCA, WI · 637 people · Groundwater BROWNSVILLE WATERWORKS BROWSVILLE, WI · 630 people · Groundwater AUTUMN RIDGE WATER SYSTEM LLC IXONIA, WI · 575 people · Groundwater KIELER SD NO 1 KIELER, WI · 560 people · Groundwater LINDEN WATERWORKS LINDEN, WI · 547 people · Groundwater SPACIOUS ACRES MOBILE HOME COMMUNITY MENOMONIE FALLS, WI · 525 people · Groundwater SOUTH WAYNE WATERWORKS SOUTH WAYNE, WI · 478 people · Groundwater TREMAIN MOBILE HOME PARK STEVENS POINT, WI · 475 people · Groundwater HOUSE ON THE ROCK RESORT SPRING GREEN, WI · 470 people · Groundwater COBB WATERWORKS COBB, WI · 458 people · Groundwater BAY VIEW HEIGHTS INC OREM, UT · 450 people · Groundwater SEXTONVILLE WATERWORKS SEXTONVILLE, WI · 425 people · Groundwater BLUE RIVER WATERWORKS BLUE RIVER, WI · 424 people · Groundwater CLYMAN WATERWORKS CLYMAN, WI · 422 people · Groundwater NORTH HILLS MHP BARRINGTON, IL · 420 people · Groundwater LAKE FOREST WATER COOP MADISON, WI · 400 people · Groundwater WINDSOR WATER UTILITY NORTH WINDSOR, WI · 400 people · Groundwater TENNYSON WATERWORKS POTOSI, WI · 367 people · Groundwater BAGLEY WATERWORKS BAGLEY, WI · 353 people · Groundwater CAZENOVIA WATERWORKS CAZENOVIA, WI · 351 people · Groundwater FITCHBURG UTILITY DIST 1 SOUTH FITCHBURG, WI · 350 people · Groundwater FRIESLAND WATERWORKS FRIESLAND, WI · 345 people · Groundwater LOWELL WATERWORKS LOWELL, WI · 337 people · Groundwater LEROY SANITARY DISTRICT 1 MAYVILLE, WI · 320 people · Groundwater CARAVILLA EDUCATION AND REHAB CENTER JANESVILLE, WI · 298 people · Groundwater REWEY WATERWORKS REWEY, WI · 290 people · Groundwater HOLLANDALE WATERWORKS HOLLANDALE, WI · 283 people · Groundwater PLEASANT VIEW NURSING HOME MONROE, WI · 260 people · Groundwater BROWNTOWN WATERWORKS BROWNTOWN, WI · 256 people · Groundwater PINE VALLEY COMMUNITY VILLAGE RICHLAND CENTER, WI · 225 people · Groundwater GRATIOT WATERWORKS GRATIOT, WI · 224 people · Groundwater SINSINAWA DOMINICANS INC SINSINAWA, WI · 213 people · Groundwater MOUNT HOPE WATERWORKS MOUNT HOPE, WI · 181 people · Groundwater HIDDEN MEADOWS WATERTOWN, WI · 166 people · Groundwater DONS MOBILE MANOR WAUNAKEE, WI · 160 people · Groundwater PATCH GROVE WATERWORKS PATCH GROVE, WI · 160 people · Groundwater LAKEWOOD VILLAGE BAYSIDE, WI · 160 people · Groundwater MIDWAY VILLAGE MOBILE HOME PARK CEDAREDGE, CO · 160 people · Groundwater POYNETTE MOBILE ESTATES CHICAGO, IL · 150 people · Groundwater DANVILLE DRIVE SERVICE AREA FITCHBURG, WI · 150 people · Groundwater Purchased STITZER SANITARY DIST 1 STITZER, WI · 150 people · Groundwater SHADY HILL MOBILE HOME PARK STEVENS POINT, WI · 140 people · Groundwater RIMROCK ROAD NEIGHBORHOOD FITCHBURG, WI · 135 people · Groundwater Purchased SUNNYSIDE ESTATES BARABOO, WI · 135 people · Groundwater OAK RIDGE MOBILE COM 1 & 2 FARMINGTON HILLS, MI · 133 people · Groundwater OAKHILL WATERWORKS EDGERTON, WI · 130 people · Groundwater APPLEWOOD HILL MADISON, WI · 125 people · Groundwater MAPLE GROVE MHP BEAVER DAM, WI · 125 people · Groundwater BREEZY KNOLL COMMUNITY CEDAREDGE, CO · 116 people · Groundwater WISCONSIN ACADEMY MAIN CAMPUS FALL RIVER, WI · 115 people · Groundwater