States / Wisconsin / Drinking Water
Drinking Water Systems in Wisconsin
1,022 community water systems serving about 4,236,576 people. 411 have a health-based violation on record since 2015, 26 of them unresolved.
SystemHealth-based violations (2015+)
PEPIN WATERWORKS · PEPIN · 816 served · groundwater21 (6 unresolved)
MANITOU FALLS SANITARY DISTRICT NO 1 · SUPERIOR · 95 served · groundwater24 (4 unresolved)
JUNEAU WATERWORKS · JUNEAU · 2,627 served · groundwater33 (3 unresolved)
SPRING GREEN ESTATES SOUTH · SPRING GREEN · 40 served · groundwater3 (3 unresolved)
GLEN FLORA WATERWORKS · GLEN FLORA · 93 served · groundwater21 (2 unresolved)
KEYES LAKE MOBILE HOME PARK · FLORENCE · 30 served · groundwater16 (2 unresolved)
WILLIAMSBURG 207 209 AND 214 · THIENSVILLE · 70 served · groundwater2 (2 unresolved)
SHELDON WATER UTILITY · SHELDON · 265 served · groundwater25 (1 unresolved)
GENOA WATERWORKS · GENOA · 264 served · groundwater14 (1 unresolved)
KENDALL WATERWORKS · KENDALL · 458 served · groundwater9 (1 unresolved)
DALLAS WATERWORKS · DALLAS · 365 served · groundwater8 (1 unresolved)
NORRIS INC · MUKWONAGO · 141 served · groundwater5 (1 unresolved)
CARRIAGE HILLS CONDOMINIUMS · ELM GROVE · 50 served · groundwater5 (1 unresolved)
LAKE HALLIE WATERWORKS VILLAGE OF · CHIPPEWA FALLS · 6,701 served · groundwater1 (1 unresolved)
ELLSWORTH WATERWORKS · ELLSWORTH · 3,304 served · groundwater1 (1 unresolved)
TOMAHAWK WATERWORKS · TOMAHAWK · 3,180 served · groundwater1 (1 unresolved)
AMERY WATERWORKS · AMERY · 2,962 served · groundwater1 (1 unresolved)
DARLINGTON WATERWORKS · DARLINGTON · 2,235 served · groundwater1 (1 unresolved)
RIO WATERWORKS · RIO · 1,095 served · groundwater1 (1 unresolved)
WHEELER WATERWORKS ASSOC · WHEELER · 317 served · groundwater1 (1 unresolved)
SILVER OAK APTS · SILVER LAKE · 60 served · groundwater1 (1 unresolved)
ISLAND ESTATES · LA CROSSE · 50 served · groundwater1 (1 unresolved)
HILLY HAVEN LLC · PHILLIPS · 45 served · groundwater1 (1 unresolved)
LINCOLN CREST APARTMENTS · TWIN LAKES · 32 served · groundwater1 (1 unresolved)
PRAIRIE LAKE ESTATES MHP · CHETEK · 25 served · groundwater1 (1 unresolved)
RIVER GARDEN APTS · THIENSVILLE · 25 served · groundwater1 (1 unresolved)
WAUKESHA WATER UTILITY · WAUKESHA · 70,718 served · purchased surface water1380
SUSSEX VILLAGE HALL & WATER UTILITY · SUSSEX · 11,750 served · groundwater298
PEWAUKEE CITY WATER AND SEWER UTILITY · PEWAUKEE · 8,671 served · groundwater160
DELLS CLUB CONDO ASSOC 3 · WISCONSIN DELLS · 75 served · groundwater126
TOMAH WATERWORKS · TOMAH · 9,192 served · groundwater100
PEWAUKEE VILLAGE WATERWORKS · PEWAUKEE · 8,166 served · groundwater99
WINNECONNE WATERWORKS · WINNECONNE · 2,502 served · groundwater97
DODGE SANITARY DIST 1 · DODGE · 120 served · groundwater54
ASHLAND WATER UTILITY · ASHLAND · 8,000 served · surface water51
ELKHORN WATERWORKS · ELKHORN · 10,317 served · groundwater48
WAUPUN CORRECTIONAL INST · WAUPUN · 3,706 served · groundwater46
LA VALLE WATERWORKS · LA VALLE · 365 served · groundwater45
MARSHVIEW TERRACE · WAUPUN · 40 served · groundwater42
EVANSVILLE WATERWORKS · EVANSVILLE · 5,703 served · groundwater39
JEFFERSON WATERWORKS · JEFFERSON · 7,926 served · groundwater35
HURLEY WATERWORKS · HURLEY · 1,515 served · purchased groundwater35
RANDOLPH WATER DEPT · RANDOLPH · 1,800 served · groundwater34
HILLSBORO WATERWORKS · HILLSBORO · 1,325 served · groundwater34
OSPREY MOBILE HOME PARK · GRAFTON · 150 served · groundwater32
PEARCES MOBILE HOME ESTATES · MAUSTON · 37 served · groundwater30
BROOKFIELD WATER UTILITY · BROOKFIELD · 29,070 served · groundwater29
SHADY OAKS MHP · MENOMONIE · 40 served · groundwater28
COUNTRY VIEW MOBILE HOME COMMUNITY LLC · OREGON · 80 served · groundwater27
BIRCHWOOD WATERWORKS · BIRCHWOOD · 442 served · groundwater24
LAKE MILLS WATERWORKS · LAKE MILLS · 6,211 served · groundwater23
LEROY SANITARY DISTRICT 1 · LEROY · 320 served · groundwater23
OAK CREEK WATERWORKS · OAK CREEK · 32,104 served · surface water22
TOWN OF FARMINGTON SANITARY DISTRICT · MINDORO · 275 served · groundwater22
HIDDEN MEADOWS · WATERTOWN · 166 served · groundwater21
BUTTERNUT WATERWORKS · BUTTERNUT · 283 served · groundwater20
POUND WATERWORKS · POUND · 349 served · groundwater19
ANTIGO WATERWORKS · ANTIGO · 7,780 served · groundwater18
GENOA CITY WATERWORKS · GENOA CITY · 2,766 served · groundwater18
IRON BELT WATERWORKS · IRON BELT · 211 served · groundwater18
CRYSTAL LAKE RV RESORT LLC · LODI · 725 served · groundwater17
STETSONVILLE WATERWORKS · STETSONVILLE · 563 served · groundwater16
CLARK COUNTY REHABILITATION & LIVING CENTER · OWEN · 510 served · groundwater16
TREMAIN MOBILE HOME PARK · DOUSMAN · 475 served · groundwater16
LAND O LAKES SANITARY DIST · LAND O LAKES · 450 served · groundwater16
GOODMAN SANITARY DIST NO 1 · GOODMAN · 350 served · groundwater16
FRIESLAND WATERWORKS · FRIESLAND · 345 served · groundwater16
MOUNT STERLING WATERWORKS · MOUNT STERLING · 206 served · groundwater16
POYNETTE MOBILE ESTATES · POYNETTE · 150 served · groundwater16
PARKVIEW APARTMENTS · IXONIA · 45 served · groundwater16
RIVER VISTA ESTATES LLC · POTOSI · 30 served · groundwater16
OCONTO WATERWORKS · OCONTO · 4,583 served · groundwater15
MARSHALL WATERWORKS · MARSHALL · 3,862 served · groundwater15
ST CROIX IMPROVEMENTS · PRESCOTT · 175 served · groundwater15
CARLTON HEIGHTS MHP CT 2 · STURGEON BAY · 60 served · groundwater15
LILY MEADOWS ASSISTED LIVING · WESTFIELD · 50 served · groundwater15
STONE LAKE SANITARY DISTRICT · STONE LAKE · 175 served · groundwater14
BELOIT CITY OF · BELOIT · 36,677 served · groundwater13
BARNEVELD WATERWORKS · BARNEVELD · 1,258 served · groundwater13
READSTOWN WATERWORKS · READSTOWN · 395 served · groundwater13
WHISPERING PINES APTS · SALEM · 30 served · groundwater13
MINERAL POINT WATERWORKS · MINERAL POINT · 2,487 served · groundwater12
ARLINGTON WATERWORKS · ARLINGTON · 946 served · groundwater12
LONE ROCK WATERWORKS · LONE ROCK · 895 served · groundwater12
STODDARD WATERWORKS · STODDARD · 793 served · groundwater12
COUNTY LINE ESTATES · WHITEWATER · 240 served · groundwater12
WILSON WATERWORKS · WILSON · 170 served · groundwater12
WATERLOO WATERWORKS · WATERLOO · 3,520 served · groundwater11
MIDWAY VILLAGE MOBILE HOME PARK · EVANSVILLE · 160 served · groundwater11
PRAIRIE APTS 1 & 2 · SALEM · 150 served · groundwater11
PRAIRIE APTS 3 & 4 · SALEM · 125 served · groundwater11
NORTH FOND DU LAC WATERWORKS · NORTH FOND DU LAC · 5,414 served · groundwater10
HILLCREST ESTATES MHP · ALTOONA · 850 served · groundwater10
BRANDYBROOK SUBDIVISION · WALES · 474 served · groundwater10
PENCE WATERWORKS · PENCE · 191 served · purchased groundwater10
MAIZEFIELD MHC (MANUFACTURED HOME COMMUNITY) · MOSINEE · 145 served · groundwater10
BLUFFVIEW COMMONS · LA CROSSE · 140 served · groundwater10
PINE CREST RESORT 2-UPPER WELL · DE SOTO · 51 served · groundwater10
PW LAKE VIEW ESTATES LLC · PORT WASHINGTON · 30 served · groundwater10
CAMERON WATERWORKS · CAMERON · 1,787 served · groundwater9
REEDSVILLE WATERWORKS · REEDSVILLE · 1,200 served · groundwater9
MONTREAL WATERWORKS · MONTREAL · 887 served · groundwater9
GLIDDEN SANITARY DISTRICT · GLIDDEN · 750 served · groundwater9
NEW AUBURN WATERWORKS · NEW AUBURN · 549 served · groundwater9
COUNTRY ESTATES SANITARY DISTRICT TOWN OF LYONS 1 · BURLINGTON · 500 served · groundwater9
EMBARRASS WATERWORKS · EMBARRASS · 347 served · groundwater9
LITTLE FLORIDA · MERRILL · 170 served · groundwater9
NU ROC HEALTH AND REHABILITATION CENTER · LAONA · 86 served · groundwater9
COLUMBUS UTILITIES · COLUMBUS · 5,173 served · groundwater8
KIEL WATERWORKS · KIEL · 3,932 served · groundwater8
CAMBRIA WATERWORKS · CAMBRIA · 767 served · groundwater8
RIDGEWAY WATERWORKS · RIDGEWAY · 690 served · groundwater8
HAUGEN WATERWORKS · HAUGEN · 287 served · groundwater8
IRONTON WATERWORKS · LA VALLE · 253 served · groundwater8
GRATIOT WATERWORKS · GRATIOT · 224 served · groundwater8
DONS MOBILE MANOR · WAUNAKEE · 160 served · groundwater8
WESTBORO SAN DIST 1 · WESTBORO · 150 served · groundwater8
AMANI VILLAGE SANITARY DIST · OSCEOLA · 100 served · groundwater8
HEIDEL RD APTS 139 · THIENSVILLE · 40 served · groundwater8
STATELINE MOBILE HOME PARK · HAZEL GREEN · 37 served · groundwater8
MENOMONEE FALLS WW - SURFACE WATER · MENOMONEE FALLS · 23,867 served · purchased surface water7
BRILLION WATERWORKS · BRILLION · 3,262 served · groundwater7
MONDOVI WATERWORKS · MONDOVI · 2,667 served · groundwater7
WASHBURN WATERWORKS · WASHBURN · 2,280 served · groundwater7
BANGOR WATERWORKS · BANGOR · 1,520 served · groundwater7
CORNELL WATERWORKS · CORNELL · 1,390 served · groundwater7
HANCOCK WATERWORKS · HANCOCK · 419 served · groundwater7
KELLNERSVILLE WATERWORKS · KELLNERSVILLE · 301 served · groundwater7
WEYERHAEUSER WATERWORKS · WEYERHAUSER · 238 served · groundwater7
SHELBY TN OF SD 2 SKYLINE · LA CROSSE · 156 served · groundwater7
NEW RICHMOND ESTATES · NEW RICHMOND · 95 served · groundwater7
EDGEWOOD MOBILE HOME PARK · GENOA · 90 served · groundwater7
WILLOW GLEN APARTMENTS · MUSKEGO · 80 served · groundwater7
KNOLLCREST · DELAFIELD · 66 served · groundwater7
MEDFORD MHP LLC · MEDFORD · 51 served · groundwater7
COUNTRY VINEYARD 4 · OREGON · 28 served · groundwater7
HOWARD WATERWORKS · GREEN BAY · 21,133 served · purchased surface water6
HOLMEN WATERWORKS · HOLMEN · 10,147 served · groundwater6
MILTON WATERWORKS · MILTON · 5,588 served · groundwater6
PRESCOTT WATERWORKS · PRESCOTT · 4,258 served · groundwater6
WISCONSIN DELLS WATERWORKS · WISCONSIN DELLS · 3,232 served · groundwater6
ABBOTSFORD WATERWORKS · ABBOTSFORD · 2,502 served · groundwater6
THORP WATERWORKS · THORP · 1,636 served · groundwater6
SHARON WATERWORKS · SHARON · 1,549 served · groundwater6
CRIVITZ WATERWORKS · CRIVITZ · 1,026 served · groundwater6
LAONA SANITARY DIST · LAONA · 950 served · groundwater6
MONTFORT WATERWORKS · MONTFORT · 718 served · groundwater6
SADDLE RIDGE ESTATES · PORTAGE · 700 served · groundwater6
WAUSAUKEE WATERWORKS · WAUSAUKEE · 585 served · groundwater6
LAKE FOREST WATER COOP · MADISON · 400 served · groundwater6
ROCK SPRINGS WATERWORKS · ROCK SPRINGS · 292 served · groundwater6
STITZER SANITARY DIST 1 · STITZER · 150 served · groundwater6
LUDWELL ESTATES · ELKHORN · 100 served · groundwater6
WIOTA SANITARY DISTRICT · SOUTH WAYNE · 98 served · groundwater6
OAK PARK COMMUNITY · PLATTEVILLE · 90 served · groundwater6
LINDEN LANE APTS 141 · THIENSVILLE · 75 served · groundwater6
COUNTRY AIRE CONDOS 4875 · HARTLAND · 40 served · groundwater6
BIRCHWOOD TRAILER COURT · EVANSVILLE · 32 served · groundwater6
HUDSON WATERWORKS · HUDSON · 18,558 served · groundwater5
RICE LAKE WATERWORKS · RICE LAKE · 9,012 served · groundwater5
LEDGEVIEW TN SANITARY DIST 2 · DE PERE · 7,602 served · purchased surface water5
EDGERTON WATERWORKS · EDGERTON · 5,512 served · groundwater5
BLOOMFIELD, VILLAGE OF · PELL LAKE · 4,071 served · groundwater5
LODI WATERWORKS · LODI · 3,146 served · groundwater5
GALESVILLE WATERWORKS · GALESVILLE · 1,679 served · groundwater5
ELKHART LAKE WATERWORKS · ELKHART LAKE · 1,567 served · groundwater5
MILLTOWN WATERWORKS · MILLTOWN · 915 served · groundwater5
CASSVILLE WATERWORKS · CASSVILLE · 777 served · groundwater5
WEBSTER WATERWORKS · WEBSTER · 652 served · groundwater5
LAKE DRIVE WATER TRUST · OCONOMOWOC · 500 served · groundwater5
GAYS MILLS WATERWORKS · GAYS MILLS · 490 served · groundwater5
ALMA CENTER WATERWORKS · ALMA CENTER · 487 served · groundwater5
FAIRCHILD WATERWORKS · FAIRCHILD · 451 served · groundwater5
BAY VIEW HEIGHTS INC · STOUGHTON · 450 served · groundwater5
MERRIMAC WATERWORKS · MERRIMAC · 440 served · groundwater5
MARIAN HEIGHTS SUBDIVISION · ELM GROVE · 400 served · groundwater5
ELCHO SANITARY DISTRICT 1 · ELCHO · 400 served · groundwater5
CURTISS WATERWORKS · CURTISS · 346 served · groundwater5
RADISSON WATERWORKS · RADISSON · 241 served · groundwater5
PINE VALLEY COMMUNITY VILLAGE · RICHLAND CENTER · 225 served · groundwater5
HOULTON MHP LLC · HOULTON · 170 served · groundwater5
OAK RIDGE MOBILE COM 1 & 2 · FORT ATKINSON · 133 served · groundwater5
BREEZY KNOLL COMMUNITY · CAMBRIDGE · 116 served · groundwater5
ANDERSONS TRAILER COURT · RICE LAKE · 95 served · groundwater5
RUSTIC ACRES MHP · LITTLE SUAMICO · 90 served · groundwater5
TAMARACK HEALTH HAYWARD MEDICAL CENTER · HAYWARD · 85 served · groundwater5
PINE ISLAND ESTATES · NEILLSVILLE · 75 served · groundwater5
EVERGREEN ESTATES · ARBOR VITAE · 71 served · groundwater5
ASPEN RIDGE · MARENGO · 50 served · groundwater5
PIKES BAY MARINA · BAYFIELD · 45 served · groundwater5
WOLFS MOBILE HOMES · WHITEWATER · 40 served · groundwater5
52ND AVE WATER GROUP · KENOSHA · 35 served · groundwater5
SANCTUARY OF DELAFIELD · DELAFIELD · 27 served · groundwater5
STEVENS POINT WATERWORKS · STEVENS POINT · 26,717 served · groundwater4
SUPERIOR WATER LIGHT & POWER COMPANY · SUPERIOR · 26,084 served · surface water4
MARSHFIELD UTILITIES · MARSHFIELD · 18,815 served · groundwater4
PLOVER WATERWORKS · PLOVER · 13,486 served · groundwater4
MERRILL WATERWORKS · MERRILL · 9,661 served · groundwater4
SHAWANO LK SAN DIST 1 · SHAWANO · 4,950 served · groundwater4
SUAMICO WATERWORKS · SUAMICO · 4,697 served · groundwater4
WRIGHTSTOWN WATERWORKS · WRIGHTSTOWN · 3,815 served · purchased surface water4
STANLEY WATERWORKS · STANLEY · 3,500 served · groundwater4
NEW HOLSTEIN WATERWORKS · NEW HOLSTEIN · 3,012 served · groundwater4
KEWAUNEE WATERWORKS · KEWAUNEE · 2,848 served · groundwater4
WILLIAMS BAY WATERWORKS · WILLIAMS BAY · 2,601 served · groundwater4
POYNETTE WATERWORKS · POYNETTE · 2,520 served · groundwater4
WALWORTH WATERWORKS · WALWORTH · 2,304 served · groundwater4
AUGUSTA WATERWORKS · AUGUSTA · 1,450 served · groundwater4
MONTELLO WATERWORKS · MONTELLO · 1,329 served · groundwater4
RIB LAKE WATERWORKS · RIB LAKE · 945 served · groundwater4
DORCHESTER WATERWORKS · DORCHESTER · 834 served · groundwater4
ARGYLE WATERWORKS · ARGYLE · 823 served · groundwater4
COLEMAN WATERWORKS · COLEMAN · 727 served · groundwater4
POTOSI WATERWORKS · POTOSI · 718 served · groundwater4
ELEVA WATERWORKS · ELEVA · 635 served · groundwater4
MELROSE WATERWORKS · MELROSE · 524 served · groundwater4
SURING WATERWORKS · SURING · 517 served · groundwater4
THREE LAKES SANITARY DISTRICT · THREE LAKES · 500 served · groundwater4
HOLLAND TN SANITARY DIST · TOWN OF HOLLAND · 495 served · groundwater4
WILTON WATERWORKS · WILTON · 490 served · groundwater4
MATTOON WATERWORKS · MATTOON · 450 served · groundwater4
TENNYSON WATERWORKS · POTOSI · 367 served · groundwater4
LOWELL WATERWORKS · LOWELL · 337 served · groundwater4
CEDAR LAKE HOME 5 · WEST BEND · 330 served · groundwater4
NORTHERNAIRE SANITARY DISTRICT · THREE LAKES · 315 served · groundwater4
FIFIELD SANITARY DISTRICT · FIFIELD · 300 served · groundwater4
HOLLANDALE WATERWORKS · HOLLANDALE · 283 served · groundwater4
MAINE WATER UTILITY · WAUSAU · 271 served · groundwater4
PLEASANT VIEW NURSING HOME · MONROE · 260 served · groundwater4
BROWNTOWN WATERWORKS · BROWNTOWN · 256 served · groundwater4
CEDAR LAKE HOME 9 · WEST BEND · 206 served · groundwater4
BLACKWELL CIVILIAN CONSVTN CTR · LAONA · 190 served · groundwater4
BLACK RIVER CORRECTIONAL CENTER · BLACK RIVER FALLS · 163 served · groundwater4
RIVERVIEW ESTATES MHP · PLOVER · 150 served · groundwater4
SHADY HILL MOBILE HOME PARK · CLINTON · 140 served · groundwater4
BOARDWALK MHC LLC · MARSHFIELD · 130 served · groundwater4
HOFFMANNS WISSOTA COURT · CHIPPEWA FALLS · 126 served · groundwater4
MAIDEN ROCK WATER UTILITY · MAIDEN ROCK · 118 served · groundwater4
TONY WATERWORKS · TONY · 105 served · groundwater4
S AND J WILD RIVER MHP · HAYWARD · 90 served · groundwater4
BLUE SPRUCE MOBILE HOME COMMUNITY · BLACK RIVER FALLS · 80 served · groundwater4
PINE GROVE VILLA · BANCROFT · 75 served · groundwater4
DELLS CLUB CONDO ASSOC 1 · WISCONSIN DELLS · 75 served · groundwater4
HILLTOP ESTATES MHP · RIVER FALLS · 64 served · groundwater4
OAK RIDGE MOBILE COM 4 · FORT ATKINSON · 60 served · groundwater4
HICKORY SHADE · WISCONSIN RAPIDS · 55 served · groundwater4
CANOE VILLA MHC · CAMERON · 50 served · groundwater4
WOODLAND ESTATES MHC 1 · KANSASVILLE · 50 served · groundwater4
EDGEWOOD COUNTRY ESTATES · MOSINEE · 49 served · groundwater4
RIVER VALLEY APTS SOUTH · IXONIA · 48 served · groundwater4
HIDDEN ACRES MOBILE PK 1 · ARBOR VITAE · 32 served · groundwater4
PIRATES COVE MOBILE HOME COMMUNITY · EDGERTON · 25 served · groundwater4
SUN PRAIRIE UTILITIES · SUN PRAIRIE · 39,300 served · groundwater3
JACKSON WATERWORKS · JACKSON · 7,844 served · groundwater3
WAUPACA WATERWORKS · WAUPACA · 6,062 served · groundwater3
CLINTONVILLE UTILITIES · CLINTONVILLE · 4,635 served · groundwater3
HORICON WATERWORKS · HORICON · 3,682 served · groundwater3
SHERWOOD WATERWORKS · SHERWOOD · 3,114 served · purchased surface water3
NEW LISBON WATERWORKS · NEW LISBON · 2,526 served · groundwater3
HAZEL GREEN WATERWORKS · HAZEL GREEN · 1,193 served · groundwater3
GREEN LAKE WATERWORKS · GREEN LAKE · 1,002 served · groundwater3
FOND DU LAC TN WATER UTILITY · FOND DU LAC · 980 served · purchased groundwater3
WHITELAW WATERWORKS · WHITELAW · 757 served · groundwater3
REESEVILLE WATERWORKS · REESEVILLE · 718 served · groundwater3
TIGERTON WATERWORKS · TIGERTON · 705 served · groundwater3
LENA WATERWORKS · LENA · 585 served · groundwater3
AVOCA WATERWORKS · AVOCA · 545 served · groundwater3
GRESHAM WATERWORKS · GRESHAM · 534 served · groundwater3
FOREST JUNCTION PUB UTIL · FOREST JUNCTION · 487 served · groundwater3
FOUNTAIN CITY WATERWORKS · FOUNTAIN CITY · 443 served · groundwater3
CLYMAN WATERWORKS · CLYMAN · 422 served · groundwater3
CAZENOVIA WATERWORKS · CAZENOVIA · 351 served · groundwater3
GRANTON WATERWORKS · GRANTON · 349 served · groundwater3
ST JOHNS NORTHWESTERN ACADEMIES · DELAFIELD · 340 served · groundwater3
FULTON UTILITY DISTRICT · EDGERTON · 200 served · purchased groundwater3
DEER TRAIL VILLAGE · MOSINEE · 120 served · groundwater3
COZY MHP LLC FRONT · EAU CLAIRE · 111 served · groundwater3
RACINE WATERWORKS · RACINE · 105,100 served · surface water2
FOND DU LAC WATERWORKS · FOND DU LAC · 44,678 served · groundwater2
GERMANTOWN WATER UTILITY · GERMANTOWN · 20,027 served · groundwater2
RIVER FALLS WATERWORKS · RIVER FALLS · 16,000 served · groundwater2
ALLOUEZ WATERWORKS · GREEN BAY · 13,923 served · purchased surface water2
LITTLE CHUTE WATERWORKS · LITTLE CHUTE · 12,168 served · groundwater2
TWO RIVERS WATERWORKS · TWO RIVERS · 11,270 served · surface water2
PLEASANT PRAIRIE WATER UTILITY · PLEASANT PRAIRIE · 10,754 served · purchased surface water2
DEFOREST WATERWORKS · DEFOREST · 10,500 served · groundwater2
KIMBERLY WATERWORKS · KIMBERLY · 7,608 served · groundwater2
KRONENWETTER WATER & SEWER UTILITY · KRONENWETTER · 6,931 served · groundwater2
WATERFORD WATERWORKS · WATERFORD · 5,368 served · groundwater2
CHILTON WATERWORKS · CHILTON · 4,191 served · groundwater2
BLOOMER WATERWORKS · BLOOMER · 3,680 served · groundwater2
COMBINED LOCKS WATERWORKS · COMBINED LOCKS · 3,609 served · purchased groundwater2
BLACK RIVER FALLS WATERWORKS · BLACK RIVER FALLS · 3,608 served · groundwater2
HORTONVILLE WATER UTILITY · HORTONVILLE · 3,028 served · groundwater2
OCONTO FALLS WATERWORKS · OCONTO FALLS · 2,892 served · groundwater2
DENMARK WATERWORKS · DENMARK · 2,684 served · purchased surface water2
WESTBY WATERWORKS · WESTBY · 2,400 served · groundwater2
DOUSMAN WATER UTILITY · DOUSMAN · 2,350 served · groundwater2
PRAIRIE VILLAGE WATER TRUST · NORTH PRAIRIE · 2,100 served · groundwater2
FOX LAKE CORRECTIONAL INSTITUTION · FOX LAKE · 1,850 served · groundwater2
SPENCER WATERWORKS · SPENCER · 1,848 served · groundwater2
FONTANA WATER UTILITY · FONTANA · 1,839 served · groundwater2
MARATHON CITY WATERWORKS · MARATHON CITY · 1,695 served · groundwater2
CAMBRIDGE WATER & SEWER UTILITY · CAMBRIDGE · 1,638 served · groundwater2
FEDERAL CORRECTIONAL INSTITUTION · OXFORD · 1,550 served · groundwater2
CLEVELAND WATERWORKS · CLEVELAND · 1,524 served · groundwater2
BLAIR WATERWORKS · BLAIR · 1,280 served · groundwater2
THERESA WATERWORKS · THERESA · 1,262 served · groundwater2
PRINCETON WATERWORKS · PRINCETON · 1,166 served · groundwater2
OAKHILL CORRECTIONAL INST · OREGON · 1,096 served · groundwater2
ATHENS WATERWORKS · ATHENS · 1,025 served · groundwater2
BELMONT WATERWORKS · BELMONT · 991 served · groundwater2
SHELL LAKE WATERWORKS · SHELL LAKE · 950 served · groundwater2
SOUTHERN WISCONSIN CENTER · UNION GROVE · 950 served · groundwater2
FOOTVILLE WATERWORKS · FOOTVILLE · 816 served · groundwater2
PLAIN WATERWORKS · PLAIN · 792 served · groundwater2
STOCKBRIDGE WATERWORKS · STOCKBRIDGE · 650 served · groundwater2
ROCKLAND WATERWORKS · ROCKLAND · 642 served · groundwater2
BROWNSVILLE WATERWORKS · BROWNSVILLE · 630 served · groundwater2
IRON RIVER SANITARY DISTRICT · IRON RIVER · 600 served · groundwater2
KIELER SD NO 1 · KIELER · 560 served · groundwater2
ONTARIO WATERWORKS · ONTARIO · 554 served · groundwater2
ADELL WATERWORKS · ADELL · 510 served · groundwater2
KNAPP WATERWORKS · KNAPP · 486 served · groundwater2
HOUSE ON THE ROCK RESORT · SPRING GREEN · 470 served · groundwater2
COBB WATERWORKS · COBB · 458 served · groundwater2
COCHRANE WATERWORKS · COCHRANE · 450 served · groundwater2
HARVEST VIEW MHC · UNION GROVE · 400 served · groundwater2
BAGLEY WATERWORKS · BAGLEY · 353 served · groundwater2
WINTER WATERWORKS · WINTER · 344 served · groundwater2
EASTMAN WATERWORKS · EASTMAN · 342 served · groundwater2
HAWKINS WATERWORKS · HAWKINS · 333 served · groundwater2
OAKDALE WATERWORKS · OAKDALE · 317 served · groundwater2
REWEY WATERWORKS · REWEY · 290 served · groundwater2
BAINS COUNTRY ESTATES MHP · SHEBOYGAN FALLS · 200 served · groundwater2
MIDDLE RIVER HEALTH AND REHAB CENTER · SOUTH RANGE · 200 served · groundwater2
MOUNT HOPE WATERWORKS · MOUNT HOPE · 181 served · groundwater2
TWIN LAKES PARK WATER COOP · TWIN LAKES · 150 served · groundwater2
NORTHLAND MISSION · DUNBAR · 75 served · groundwater2
YUBA WATERWORKS · YUBA · 68 served · groundwater2
CAMBRIDGE PLACE OF DELAFIELD · DELAFIELD · 50 served · groundwater2
NORTHFIELD SAN DIST 1 · HIXTON · 50 served · groundwater2
DELLS ESTATES · WISCONSIN DELLS · 30 served · groundwater2
MADISON WATER UTILITY · MADISON · 272,000 served · groundwater1
MIDDLETON WATERWORKS · MIDDLETON · 23,868 served · groundwater1
CALEDONIA WATER UTILITY - VILLAGE OF · CALEDONIA · 21,819 served · purchased surface water1
VERONA WATERWORKS · VERONA · 14,030 served · groundwater1
FOX CROSSING UTILITIES WEST · NEENAH · 14,000 served · groundwater1
FOX CROSSING UTILITIES EAST · NEENAH · 10,927 served · purchased surface water1
ALTOONA WATERWORKS · ALTOONA · 9,627 served · groundwater1
COTTAGE GROVE WATERWORKS · COTTAGE GROVE · 9,345 served · groundwater1
RHINELANDER WATER & WASTEWATER · RHINELANDER · 8,234 served · groundwater1
MUSKEGO WATER UTILITY · MUSKEGO · 8,150 served · groundwater1
RIPON WATER UTILITY · RIPON · 7,716 served · groundwater1
SLINGER WATER UTILITY · SLINGER · 5,659 served · groundwater1
RICHLAND CENTER WATERWORKS · RICHLAND CENTER · 5,100 served · groundwater1
UNION GROVE WATERWORKS · UNION GROVE · 4,900 served · groundwater1
MAUSTON WATERWORKS · MAUSTON · 4,456 served · groundwater1
PRAIRIE DU SAC WATERWORKS · PRAIRIE DU SAC · 4,006 served · groundwater1
SOMERSET WATERWORKS · SOMERSET · 3,334 served · groundwater1
JOHNSON CREEK WATERWORKS · JOHNSON CREEK · 3,318 served · groundwater1
ROTHSCHILD WATERWORKS · ROTHSCHILD · 3,190 served · groundwater1
OSCEOLA WATERWORKS · OSCEOLA · 2,680 served · groundwater1
BELGIUM WATERWORKS · BELGIUM · 2,493 served · groundwater1
LAKELAND SANITARY DIST 1 · MINOCQUA · 2,381 served · groundwater1
NEW GLARUS WATERWORKS · NEW GLARUS · 2,348 served · groundwater1
CUBA CITY WATERWORKS · CUBA CITY · 2,141 served · groundwater1
CRANDON WATERWORKS · CRANDON · 1,958 served · groundwater1
FALL RIVER WATERWORKS · FALL RIVER · 1,793 served · groundwater1
STRATFORD WATERWORKS · STRATFORD · 1,643 served · groundwater1
EAGLE RIVER WATERWORKS · EAGLE RIVER · 1,530 served · groundwater1
BLACK EARTH WATERWORKS · BLACK EARTH · 1,493 served · groundwater1
EDGAR WATERWORKS · EDGAR · 1,491 served · groundwater1
PHILLIPS WATERWORKS · PHILLIPS · 1,473 served · groundwater1
FALL CREEK WATERWORKS · FALL CREEK · 1,269 served · groundwater1
MONTICELLO WATERWORKS · MONTICELLO · 1,217 served · groundwater1
AMHERST WATERWORKS · AMHERST · 1,119 served · groundwater1
BOYCEVILLE WATERWORKS · BOYCEVILLE · 1,043 served · groundwater1
NECEDAH WATERWORKS · NECEDAH · 844 served · groundwater1
CLAYTON WATERWORKS · CLAYTON · 765 served · groundwater1
COON VALLEY WATERWORKS · COON VALLEY · 765 served · groundwater1
MEQUON TRAIL TOWNHOMES · MEQUON · 615 served · groundwater1
MERRILLAN WATERWORKS · MERRILLAN · 531 served · groundwater1
GLENBEULAH WATERWORKS · GLENBEULAH · 461 served · groundwater1
BLUFFVIEW SANITARY DISTRICT · PRAIRIE DU SAC · 450 served · groundwater1
VILLA DIANN MHP · EAU CLAIRE · 420 served · groundwater1
TAN OAK APTS · TWIN LAKES · 325 served · groundwater1
CAREFREE ESTATES MHP · TREVOR · 300 served · groundwater1
BRIDGEPORT SAN DIST NO 1 · PRAIRIE DU CHIEN · 300 served · purchased groundwater1
CARAVILLA EDUCATION AND REHAB CENTER · JANESVILLE · 298 served · groundwater1
DANBURY SANITARY DISTRICT · DANBURY · 286 served · groundwater1
ARBORS · DELAFIELD · 280 served · groundwater1
PINES SUBDIVISION · MEQUON · 200 served · groundwater1
COTTAGES AT CEDAR RUN · WEST BEND · 183 served · groundwater1
MAPLE PARK CONDOMINIUMS · PRAIRIE DU SAC · 150 served · groundwater1
EMERALD WOODS CONDOS · ELM GROVE · 150 served · groundwater1
VINTAGE ESTATES · MEQUON · 130 served · groundwater1
LAKEWOOD VILLAGE APTS · TWIN LAKES · 125 served · groundwater1
MARYVILLE SD 2 · HAZEL GREEN · 100 served · groundwater1
PIRCO MHP · WISCONSIN RAPIDS · 97 served · groundwater1
TAINTER WOODS CONDOMINIUMS · COLFAX · 85 served · groundwater1
RIVER TRAILS ESTATES WATER USERS · MEQUON · 84 served · groundwater1
APARTMENTS OF STONERIDGE · DELAFIELD · 75 served · groundwater1
STONECROFT CONDOMINIUM ASSN · GRAFTON · 50 served · groundwater1
HILLS OF WALES APTS · WALES · 50 served · groundwater1
EAST TROY S D 3 · EAST TROY · 40 served · groundwater1
BLUFFSIDE COURT · CASSVILLE · 40 served · groundwater1
EVERGREENS · NORTH LAKE · 40 served · groundwater1
RIVER SPRINGS APARTMENTS LLC · ROCHESTER · 38 served · groundwater1
MEQUON WATER TRUST · MEQUON · 26 served · groundwater1
2YK LLC · ANTIGO · 25 served · groundwater1
MILWAUKEE WATERWORKS · MILWAUKEE · 626,000 served · surface waternone on record
GREEN BAY WATERWORKS · GREEN BAY · 107,369 served · surface waternone on record
KENOSHA WATER UTILITY · KENOSHA · 99,218 served · surface waternone on record
APPLETON WATERWORKS · MENASHA · 74,511 served · surface waternone on record
EAU CLAIRE WATERWORKS · EAU CLAIRE · 70,587 served · groundwaternone on record
JANESVILLE WATER UTILITY · JANESVILLE · 64,415 served · groundwaternone on record
WEST ALLIS WATERWORKS · WEST ALLIS · 63,240 served · purchased surface waternone on record
OSHKOSH WATERWORKS · OSHKOSH · 63,000 served · surface waternone on record
LA CROSSE WATERWORKS · LA CROSSE · 53,000 served · groundwaternone on record
SHEBOYGAN WATER UTILITIES · SHEBOYGAN · 49,931 served · surface waternone on record
WAUWATOSA WATERWORKS · WAUWATOSA · 49,064 served · purchased surface waternone on record
WAUSAU WATERWORKS · WAUSAU · 39,994 served · groundwaternone on record
NORTH SHORE WATER COMMISSION · GLENDALE · 35,598 served · surface waternone on record
MANITOWOC WATERWORKS · MANITOWOC · 34,500 served · surface waternone on record
WEST BEND WATERWORKS · WEST BEND · 31,752 served · groundwaternone on record
NEW BERLIN WATER UTILITY · NEW BERLIN · 27,899 served · purchased surface waternone on record
NEENAH WATERWORKS · NEENAH · 27,506 served · surface waternone on record
DE PERE WATERWORKS SA 1 · DE PERE · 25,660 served · purchased surface waternone on record
FITCHBURG UTILITY DIST 1 · FITCHBURG · 24,500 served · groundwaternone on record
WATERTOWN WATERWORKS · WATERTOWN · 23,945 served · groundwaternone on record
FRANKLIN WATER UTILITY · FRANKLIN · 22,500 served · purchased surface waternone on record
GRAND CHUTE TN SAN DIST 1 · GRAND CHUTE · 21,583 served · purchased surface waternone on record
SOUTH MILWAUKEE WATERWORKS · SOUTH MILWAUKEE · 21,340 served · surface waternone on record
WIS RAPIDS WATER WORKS & LIGHTING COMM · WISCONSIN RAPIDS · 20,000 served · groundwaternone on record
CUDAHY WATERWORKS · CUDAHY · 18,659 served · surface waternone on record
ONALASKA WATERWORKS · ONALASKA · 18,000 served · groundwaternone on record
ASHWAUBENON WATERWORKS · GREEN BAY · 17,730 served · purchased surface waternone on record
KAUKAUNA UTILITIES · KAUKAUNA · 17,493 served · groundwaternone on record
BELLEVUE WATERWORKS · GREEN BAY · 16,715 served · purchased surface waternone on record
BEAVER DAM WATER UTILITY · BEAVER DAM · 16,200 served · groundwaternone on record
WESTON MUNICIPAL UTILITIES · WESTON · 16,000 served · groundwaternone on record
MENOMONIE WATERWORKS · MENOMONIE · 15,950 served · groundwaternone on record
HARTFORD WATERWORKS · HARTFORD · 15,805 served · groundwaternone on record
OCONOMOWOC WATERWORKS · OCONOMOWOC · 15,805 served · groundwaternone on record
MENASHA ELEC & WATER UTIL · MENASHA · 15,144 served · surface waternone on record
WAUNAKEE WATERWORKS · WAUNAKEE · 14,879 served · groundwaternone on record
GREENDALE WATERWORKS · GREENDALE · 14,393 served · purchased surface waternone on record
WHITEFISH BAY WATERWORKS · WHITEFISH BAY · 14,272 served · purchased surface waternone on record
WHITEWATER WATERWORKS · WHITEWATER · 14,000 served · groundwaternone on record
SHOREWOOD WATERWORKS · SHOREWOOD · 13,535 served · purchased surface waternone on record
CHIPPEWA FALLS WATERWORKS · CHIPPEWA FALLS · 13,375 served · groundwaternone on record
STOUGHTON WATERWORKS · STOUGHTON · 13,078 served · groundwaternone on record
DARBOY SANITARY DIST 1 · APPLETON · 13,024 served · groundwaternone on record
GLENDALE WATERWORKS · GLENDALE · 12,883 served · purchased surface waternone on record
PORT WASHINGTON WATERWORKS · PORT WASHINGTON · 12,853 served · surface waternone on record
BROWN DEER WATERWORKS · BROWN DEER · 12,741 served · purchased surface waternone on record
BARABOO WATERWORKS · BARABOO · 12,703 served · groundwaternone on record
CEDARBURG L & W COMMISSION · CEDARBURG · 12,500 served · groundwaternone on record
FORT ATKINSON WATERWORKS · FORT ATKINSON · 12,390 served · groundwaternone on record
GRAFTON WATERWORKS · GRAFTON · 12,269 served · groundwaternone on record
PLATTEVILLE WATERWORKS · PLATTEVILLE · 12,268 served · groundwaternone on record
GREENVILLE UTILITIES VIL OF · GREENVILLE · 11,340 served · groundwaternone on record
OREGON WATERWORKS · OREGON · 11,200 served · groundwaternone on record
MEQUON WATER UTILITY · MEQUON · 11,152 served · purchased surface waternone on record
BURLINGTON WATERWORKS · BURLINGTON · 11,043 served · groundwaternone on record
MARINETTE WATERWORKS · MARINETTE · 10,968 served · surface waternone on record
NEW RICHMOND WATERWORKS · NEW RICHMOND · 10,824 served · groundwaternone on record
MONROE WATERWORKS · MONROE · 10,780 served · groundwaternone on record
PORTAGE WATERWORKS · PORTAGE · 10,437 served · groundwaternone on record
SPARTA WATERWORKS · SPARTA · 10,025 served · groundwaternone on record
FORT MCCOY NORTH POST · FORT MCCOY · 10,000 served · groundwaternone on record
REEDSBURG WATERWORKS · REEDSBURG · 9,984 served · groundwaternone on record
STURGEON BAY WATERWORKS · STURGEON BAY · 9,700 served · groundwaternone on record
MCFARLAND WATERWORKS · MC FARLAND · 9,676 served · groundwaternone on record
SHAWANO WATERWORKS · SHAWANO · 9,610 served · groundwaternone on record
HARTLAND WATERWORKS · HARTLAND · 9,212 served · groundwaternone on record
DELAVAN WATERWORKS · DELAVAN · 9,028 served · groundwaternone on record
PLYMOUTH UTILITIES · PLYMOUTH · 8,964 served · groundwaternone on record
SHEBOYGAN FALLS UTILITIES · SHEBOYGAN FALLS · 8,687 served · purchased surface waternone on record
MONONA WATERWORKS · MONONA · 8,624 served · groundwaternone on record
MUKWONAGO WATERWORKS · MUKWONAGO · 8,190 served · groundwaternone on record
WAUPUN UTILITIES · WAUPUN · 8,056 served · groundwaternone on record
MT HOREB WATERWORKS · MOUNT HOREB · 7,756 served · groundwaternone on record
NEW LONDON WATERWORKS · NEW LONDON · 7,187 served · groundwaternone on record
LAKE GENEVA UTILITY COMMISSION · LAKE GENEVA · 7,107 served · groundwaternone on record
FOX POINT WATERWORKS · FOX POINT · 6,808 served · purchased surface waternone on record
TOWN OF BROOKFIELD SAN DIST 4 · BROOKFIELD · 6,419 served · groundwaternone on record
RIB MOUNTAIN WATER UTILITY · WAUSAU · 6,398 served · groundwaternone on record
PRAIRIE DU CHIEN WATERWORKS · PRAIRIE DU CHIEN · 6,005 served · groundwaternone on record
BERLIN WATERWORKS · BERLIN · 5,524 served · groundwaternone on record
HARRISON UTILITIES - FKA WAVERLY SD · MENASHA · 5,500 served · purchased surface waternone on record
LAWRENCE WATERWORKS · DE PERE · 5,398 served · purchased surface waternone on record
MAYVILLE WATERWORKS · MAYVILLE · 5,112 served · groundwaternone on record
EAST TROY WATERWORKS · EAST TROY · 5,054 served · groundwaternone on record
WEST SALEM WATERWORKS · WEST SALEM · 5,045 served · groundwaternone on record
WINDSOR WATER UTILITY SOUTH · WINDSOR · 4,607 served · groundwaternone on record
SHEBOYGAN TN WATERWORKS · SHEBOYGAN · 4,596 served · groundwaternone on record
DODGEVILLE WATERWORKS · DODGEVILLE · 4,583 served · groundwaternone on record
BALDWIN WATERWORKS · BALDWIN · 4,440 served · groundwaternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.