STATE / TERRITORY LEDGER
Wisconsin drinking water system records
EPA compliance fields for active community water systems reporting at least 2,500 people served.
Systems232active CWS · pop. 2,500+
Population served3,860,956reported total; may overlap
Current violation flag29.3%68 systems
Serious-violator flag1.7%4 systems
01 / LARGEST SYSTEMS
Community water systems in Wisconsin
Population served is a system-reported service figure. It is not a count of unique state residents.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Milwaukee WaterworksWI2410100 | 626,000 | Surface water | No current violation flagged |
| Madison Water UtilityWI1130224 | 272,000 | Ground water | Other current violation flag |
| Green Bay WaterworksWI4050356 | 107,369 | Surface water | No current violation flagged |
| Racine WaterworksWI2520062 | 105,100 | Surface water | Other current violation flag |
| Kenosha Water UtilityWI2300046 | 99,218 | Surface water | No current violation flagged |
| Appleton WaterworksWI4450333 | 74,511 | Surface water | No current violation flagged |
| Waukesha Water UtilityWI2680238 | 70,718 | Surface water purchased | Other current violation flag |
| Eau Claire WaterworksWI6180230 | 70,587 | Ground water | No current violation flagged |
| Janesville Water UtilityWI1540127 | 64,415 | Ground water | No current violation flagged |
| West Allis WaterworksWI2410595 | 63,240 | Surface water purchased | No current violation flagged |
| Oshkosh WaterworksWI4710457 | 63,000 | Surface water | No current violation flagged |
| La Crosse WaterworksWI6320309 | 53,000 | Ground water | No current violation flagged |
| Sheboygan Water UtilitiesWI4600354 | 49,931 | Surface water | No current violation flagged |
| Wauwatosa WaterworksWI2410596 | 49,064 | Surface water purchased | No current violation flagged |
| Fond Du Lac WaterworksWI4200469 | 44,678 | Ground water | No current violation flagged |
| Wausau WaterworksWI7370102 | 39,994 | Ground water | No current violation flagged |
| Sun Prairie UtilitiesWI1130258 | 39,300 | Ground water | No current violation flagged |
| Beloit City OfWI1540112 | 36,677 | Ground water | No current violation flagged |
| North Shore Water CommissionWI2413515 | 35,598 | Surface water | No current violation flagged |
| Manitowoc WaterworksWI4360364 | 34,500 | Surface water | No current violation flagged |
| Oak Creek WaterworksWI2410172 | 32,104 | Surface water | Other current violation flag |
| West Bend WaterworksWI2670120 | 31,752 | Ground water | No current violation flagged |
| Brookfield Water UtilityWI2680253 | 29,070 | Ground water | Other current violation flag |
| New Berlin Water UtilityWI2680217 | 27,899 | Surface water purchased | No current violation flagged |
| Neenah WaterworksWI4710348 | 27,506 | Surface water | No current violation flagged |
| Stevens Point WaterworksWI7500141 | 26,717 | Ground water | No current violation flagged |
| Superior Water Light & Power CompanyWI8160147 | 26,084 | Surface water | Other current violation flag |
| De Pere Waterworks Sa 1WI4050453 | 25,660 | Surface water purchased | No current violation flagged |
| Fitchburg Utility Dist 1WI1130231 | 24,500 | Ground water | No current violation flagged |
| Watertown WaterworksWI1280044 | 23,945 | Ground water | No current violation flagged |
| Middleton WaterworksWI1130242 | 23,868 | Ground water | Other current violation flag |
| Menomonee Falls Ww - Surface WaterWI2680082 | 23,867 | Surface water purchased | No current violation flagged |
| Franklin Water UtilityWI2410563 | 22,500 | Surface water purchased | Other current violation flag |
| Caledonia Water Utility - Village OfWI2520184 | 21,819 | Surface water purchased | Other current violation flag |
| Grand Chute Tn San Dist 1WI4450429 | 21,583 | Surface water purchased | No current violation flagged |
| South Milwaukee WaterworksWI2410144 | 21,340 | Surface water | No current violation flagged |
| Howard WaterworksWI4050468 | 21,133 | Surface water purchased | No current violation flagged |
| Germantown Water UtilityWI2670105 | 20,027 | Ground water | Other current violation flag |
| Wis Rapids Water Works & Lighting CommWI7720108 | 20,000 | Ground water | No current violation flagged |
| Marshfield UtilitiesWI7720165 | 18,815 | Ground water | No current violation flagged |
| Cudahy WaterworksWI2410169 | 18,659 | Surface water | No current violation flagged |
| Hudson WaterworksWI6560087 | 18,558 | Ground water | Other current violation flag |
| Onalaska WaterworksWI6320327 | 18,000 | Ground water | No current violation flagged |
| Ashwaubenon WaterworksWI4050456 | 17,730 | Surface water purchased | No current violation flagged |
| Kaukauna UtilitiesWI4450336 | 17,493 | Ground water | No current violation flagged |
| Bellevue WaterworksWI4050459 | 16,715 | Surface water purchased | No current violation flagged |
| Beaver Dam Water UtilityWI1140059 | 16,200 | Ground water | No current violation flagged |
| River Falls WaterworksWI6480246 | 16,000 | Ground water | Other current violation flag |
| Weston Municipal UtilitiesWI7370163 | 16,000 | Ground water | No current violation flagged |
| Menomonie WaterworksWI6170268 | 15,950 | Ground water | No current violation flagged |
| Hartford WaterworksWI2670110 | 15,805 | Ground water | No current violation flagged |
| Oconomowoc WaterworksWI2680227 | 15,805 | Ground water | No current violation flagged |
| Menasha Elec & Water UtilWI4710334 | 15,144 | Surface water | Other current violation flag |
| Waunakee WaterworksWI1130265 | 14,879 | Ground water | No current violation flagged |
| Greendale WaterworksWI2410571 | 14,393 | Surface water purchased | No current violation flagged |
| Whitefish Bay WaterworksWI2410597 | 14,272 | Surface water purchased | No current violation flagged |
| Verona WaterworksWI1130259 | 14,030 | Ground water | Other current violation flag |
| Fox Crossing Utilities WestWI4710358 | 14,000 | Ground water | Other current violation flag |
| Whitewater WaterworksWI2650056 | 14,000 | Ground water | No current violation flagged |
| Allouez WaterworksWI4050455 | 13,923 | Surface water purchased | No current violation flagged |
| Shorewood WaterworksWI2410607 | 13,535 | Surface water purchased | No current violation flagged |
| Plover WaterworksWI7500726 | 13,486 | Ground water | No current violation flagged |
| Chippewa Falls WaterworksWI6090456 | 13,375 | Ground water | No current violation flagged |
| Stoughton WaterworksWI1130078 | 13,078 | Ground water | No current violation flagged |
| Darboy Sanitary Dist 1WI4450117 | 13,024 | Ground water | No current violation flagged |
| Glendale WaterworksWI2410168 | 12,883 | Surface water purchased | Current monitoring/reporting flag |
| Port Washington WaterworksWI2460054 | 12,853 | Surface water | No current violation flagged |
| Brown Deer WaterworksWI2410556 | 12,741 | Surface water purchased | No current violation flagged |
| Baraboo WaterworksWI1570085 | 12,703 | Ground water | No current violation flagged |
| Cedarburg L & W CommissionWI2460108 | 12,500 | Ground water | No current violation flagged |
| Fort Atkinson WaterworksWI1280103 | 12,390 | Ground water | No current violation flagged |
| Grafton WaterworksWI2460111 | 12,269 | Ground water | No current violation flagged |
| Platteville WaterworksWI1220115 | 12,268 | Ground water | No current violation flagged |
| Little Chute WaterworksWI4450338 | 12,168 | Ground water | No current violation flagged |
| Sussex Village Hall & Water UtilityWI2680233 | 11,750 | Ground water | Other current violation flag |
| Greenville Utilities Vil OfWI4450278 | 11,340 | Ground water | No current violation flagged |
| Two Rivers WaterworksWI4360436 | 11,270 | Surface water | No current violation flagged |
| Oregon WaterworksWI1130251 | 11,200 | Ground water | No current violation flagged |
| Mequon Water UtilityWI2460112 | 11,152 | Surface water purchased | No current violation flagged |
| Burlington WaterworksWI2520177 | 11,043 | Ground water | No current violation flagged |
| Marinette WaterworksWI4380395 | 10,968 | Surface water | No current violation flagged |
| Fox Crossing Utilities EastWI4710453 | 10,927 | Surface water purchased | Other current violation flag |
| New Richmond WaterworksWI6560126 | 10,824 | Ground water | No current violation flagged |
| Monroe WaterworksWI1230078 | 10,780 | Ground water | No current violation flagged |
| Pleasant Prairie Water UtilityWI2300167 | 10,754 | Surface water purchased | Other current violation flag |
| Deforest WaterworksWI1130221 | 10,500 | Ground water | Other current violation flag |
| Portage WaterworksWI1110039 | 10,437 | Ground water | No current violation flagged |
| Elkhorn WaterworksWI2650062 | 10,317 | Ground water | No current violation flagged |
| Holmen WaterworksWI6320306 | 10,147 | Ground water | Other current violation flag |
| Sparta WaterworksWI6420297 | 10,025 | Ground water | No current violation flagged |
| Fort Mccoy North PostWI6420302 | 10,000 | Ground water | No current violation flagged |
| Reedsburg WaterworksWI1570102 | 9,984 | Ground water | No current violation flagged |
| Sturgeon Bay WaterworksWI4150526 | 9,700 | Ground water | No current violation flagged |
| Mcfarland WaterworksWI1130241 | 9,676 | Ground water | No current violation flagged |
| Merrill WaterworksWI7350123 | 9,661 | Ground water | No current violation flagged |
| Altoona WaterworksWI6180280 | 9,627 | Ground water | Other current violation flag |
| Shawano WaterworksWI4590456 | 9,610 | Ground water | No current violation flagged |
| Cottage Grove WaterworksWI1130218 | 9,345 | Ground water | Other current violation flag |
| Hartland WaterworksWI2680205 | 9,212 | Ground water | No current violation flagged |
| Tomah WaterworksWI6420254 | 9,192 | Ground water | No current violation flagged |
Showing the 100 largest systems by reported population served.
02 / CITY REPORTS
Browse cities
Green Bay5 systemsDe Pere3 systemsMenasha3 systemsNeenah3 systemsBlack River Falls2 systemsBrookfield2 systemsChippewa Falls2 systemsGlendale2 systemsLake Geneva2 systemsMadison2 systemsOshkosh2 systemsPewaukee2 systemsShawano2 systemsSheboygan2 systemsWaupun2 systemsWausau2 systemsAppleton1 systemsBaraboo1 systemsBeaver Dam1 systemsBeloit1 systemsBrown Deer1 systemsBurlington1 systemsCaledonia1 systemsCedarburg1 systemsCudahy1 systemsDeforest1 systemsEau Claire1 systemsElkhorn1 systemsFitchburg1 systemsFond Du Lac1 systemsFort Atkinson1 systemsFort Mccoy1 systemsFranklin1 systemsGermantown1 systemsGrafton1 systemsGrand Chute1 systemsGreendale1 systemsGreenville1 systemsHartford1 systemsHolmen1 systemsHudson1 systemsJanesville1 systemsKaukauna1 systemsKenosha1 systemsLa Crosse1 systemsLittle Chute1 systemsManitowoc1 systemsMarinette1 systemsMarshfield1 systemsMenomonee Falls1 systemsMenomonie1 systemsMequon1 systemsMiddleton1 systemsMilwaukee1 systemsMonroe1 systemsNew Berlin1 systemsNew Richmond1 systemsOak Creek1 systemsOconomowoc1 systemsOnalaska1 systemsOregon1 systemsPlatteville1 systemsPleasant Prairie1 systemsPlover1 systemsPort Washington1 systemsPortage1 systemsRacine1 systemsRiver Falls1 systemsShorewood1 systemsSouth Milwaukee1 systemsSparta1 systemsStevens Point1 systemsStoughton1 systemsSun Prairie1 systemsSuperior1 systemsSussex1 systemsTwo Rivers1 systemsVerona1 systemsWatertown1 systemsWaukesha1 systemsWaunakee1 systemsWauwatosa1 systemsWest Allis1 systemsWest Bend1 systemsWeston1 systemsWhitefish Bay1 systemsWhitewater1 systemsWisconsin Rapids1 systems
03 / COUNTY REPORTS
Browse counties
Dane18 systemsMilwaukee14 systemsBrown13 systemsWaukesha12 systemsOutagamie11 systemsWalworth9 systemsWinnebago8 systemsDodge7 systemsMarathon7 systemsJefferson6 systemsWashington6 systemsCalumet5 systemsColumbia5 systemsOzaukee5 systemsRacine5 systemsRock5 systemsSauk5 systemsSheboygan5 systemsChippewa4 systemsGrant4 systemsLa Crosse4 systemsSt. Croix4 systemsFond du Lac3 systemsGreen3 systemsKewaunee3 systemsManitowoc3 systemsMonroe3 systemsPierce3 systemsWaupaca3 systemsBarron2 systemsEau Claire2 systemsJackson2 systemsJuneau2 systemsKenosha2 systemsLincoln2 systemsMarinette2 systemsOconto2 systemsPolk2 systemsPortage2 systemsShawano2 systemsWood2 systemsDouglas1 systemsDunn1 systems