STATE / TERRITORY LEDGER
Wisconsin drinking water system records
EPA’s September 2026 export lists 232 active community water systems in Wisconsin, with 68 current-violation flags and 4 serious-violator flags among covered systems serving at least 2,500 people.
Source: EPA SDWIS system-search export · Active community systems · Snapshot 13 Sep 2026
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
Wisconsin community water systems
EPA’s covered Wisconsin records include 232 active community systems reporting a combined population-served total of 3,860,956, which may overlap.
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 |
| Delavan WaterworksWI2650113 | 9,028 | Ground water | No current violation flagged |
| Rice Lake WaterworksWI6030138 | 9,012 | Ground water | No current violation flagged |
| Plymouth UtilitiesWI4600446 | 8,964 | Ground water | No current violation flagged |
| Sheboygan Falls UtilitiesWI4600455 | 8,687 | Surface water purchased | Other current violation flag |
| Pewaukee City Water And Sewer UtilityWI2680214 | 8,671 | Ground water | Other current violation flag |
| Monona WaterworksWI1130245 | 8,624 | Ground water | No current violation flagged |
| Rhinelander Water & WastewaterWI7440126 | 8,234 | Ground water | Other current violation flag |
| Mukwonago WaterworksWI2680209 | 8,190 | Ground water | Other current violation flag |
| Pewaukee Village WaterworksWI2680229 | 8,166 | Ground water | Current serious-violator flag |
| Muskego Water UtilityWI2681741 | 8,150 | Ground water | Other current violation flag |
| Waupun UtilitiesWI1140131 | 8,056 | Ground water | No current violation flagged |
| Ashland Water UtilityWI8020373 | 8,000 | Surface water | Current serious-violator flag |
| Jefferson WaterworksWI1280104 | 7,926 | Ground water | Other current violation flag |
| Jackson WaterworksWI2670111 | 7,844 | Ground water | Other current violation flag |
| Antigo WaterworksWI7340086 | 7,780 | Ground water | Current health-based flag |
| Mt Horeb WaterworksWI1130247 | 7,756 | Ground water | Other current violation flag |
| Ripon Water UtilityWI4200476 | 7,716 | Ground water | Other current violation flag |
| Kimberly WaterworksWI4450342 | 7,608 | Ground water | No current violation flagged |
| Ledgeview Tn Sanitary Dist 2WI4051418 | 7,602 | Surface water purchased | No current violation flagged |
| New London WaterworksWI4690398 | 7,187 | Ground water | Current monitoring/reporting flag |
| Lake Geneva Utility CommissionWI2650066 | 7,107 | Ground water | No current violation flagged |
| Kronenwetter Water & Sewer UtilityWI7371700 | 6,931 | Ground water | Other current violation flag |
| Fox Point WaterworksWI2410584 | 6,808 | Surface water purchased | No current violation flagged |
| Lake Hallie Waterworks Village OfWI6090849 | 6,701 | Ground water | Current health-based flag |
| Town Of Brookfield San Dist 4WI2680239 | 6,419 | Ground water | No current violation flagged |
| Rib Mountain Water UtilityWI7370660 | 6,398 | Ground water | No current violation flagged |
| Lake Mills WaterworksWI1280108 | 6,211 | Ground water | Current monitoring/reporting flag |
| Waupaca WaterworksWI4690402 | 6,062 | Ground water | No current violation flagged |
| Prairie Du Chien WaterworksWI6120250 | 6,005 | Ground water | No current violation flagged |
| Evansville WaterworksWI1540047 | 5,703 | Ground water | No current violation flagged |
| Slinger Water UtilityWI2670116 | 5,659 | Ground water | Other current violation flag |
| Milton WaterworksWI1540130 | 5,588 | Ground water | No current violation flagged |
| Berlin WaterworksWI4240216 | 5,524 | Ground water | No current violation flagged |
| Edgerton WaterworksWI1540119 | 5,512 | Ground water | Other current violation flag |
| Harrison Utilities - Fka Waverly SdWI4080076 | 5,500 | Surface water purchased | No current violation flagged |
| North Fond Du Lac WaterworksWI4200405 | 5,414 | Ground water | No current violation flagged |
| Lawrence WaterworksWI4051625 | 5,398 | Surface water purchased | No current violation flagged |
| Waterford WaterworksWI2520202 | 5,368 | Ground water | Other current violation flag |
| Sand Pillow055295011 | 5,230 | Ground water | No current violation flagged |
| Columbus UtilitiesWI1110038 | 5,173 | Ground water | Other current violation flag |
| Mayville WaterworksWI1140057 | 5,112 | Ground water | No current violation flagged |
| Richland Center WaterworksWI1530068 | 5,100 | Ground water | Other current violation flag |
| East Troy WaterworksWI2650123 | 5,054 | Ground water | No current violation flagged |
| West Salem WaterworksWI6320334 | 5,045 | Ground water | No current violation flagged |
| Shawano Lk San Dist 1WI4590457 | 4,950 | Ground water | Other current violation flag |
| Union Grove WaterworksWI2520200 | 4,900 | Ground water | Other current violation flag |
| Suamico WaterworksWI4051031 | 4,697 | Ground water | No current violation flagged |
| Clintonville UtilitiesWI4690391 | 4,635 | Ground water | No current violation flagged |
| Windsor Water Utility SouthWI1130267 | 4,607 | Ground water | No current violation flagged |
| Sheboygan Tn WaterworksWI4600403 | 4,596 | Ground water | No current violation flagged |
| Dodgeville WaterworksWI1250079 | 4,583 | Ground water | No current violation flagged |
| Oconto WaterworksWI4430495 | 4,583 | Ground water | No current violation flagged |
| Mauston WaterworksWI7290129 | 4,456 | Ground water | Other current violation flag |
| Baldwin WaterworksWI6560119 | 4,440 | Ground water | No current violation flagged |
| Oneida #1 Or Site #1055295703 | 4,393 | Ground water | No current violation flagged |
| Viroqua WaterworksWI6630263 | 4,362 | Ground water | No current violation flagged |
| Medford WaterworksWI8610125 | 4,318 | Ground water | No current violation flagged |
| Kewaskum WaterworksWI2670112 | 4,309 | Ground water | No current violation flagged |
| Saukville WaterworksWI2460134 | 4,268 | Ground water | No current violation flagged |
| Prescott WaterworksWI6480243 | 4,258 | Ground water | No current violation flagged |
| Chilton WaterworksWI4080222 | 4,191 | Ground water | No current violation flagged |
| Cross Plains WaterworksWI1130219 | 4,100 | Ground water | No current violation flagged |
| Bloomfield, Village OfWI2651469 | 4,071 | Ground water | Current serious-violator flag |
| Pulaski WaterworksWI4050355 | 4,040 | Ground water | No current violation flagged |
| Prairie Du Sac WaterworksWI1570100 | 4,006 | Ground water | Other current violation flag |
| Keshena055295508 | 3,960 | Ground water | No current violation flagged |
| Algoma Tn Sanitary Dist 1WI4711611 | 3,935 | Ground water | No current violation flagged |
| Kiel WaterworksWI4360427 | 3,932 | Ground water | No current violation flagged |
| Lancaster WaterworksWI1220107 | 3,907 | Ground water | No current violation flagged |
| Marshall WaterworksWI1130237 | 3,862 | Ground water | No current violation flagged |
| Wrightstown WaterworksWI4050464 | 3,815 | Surface water purchased | No current violation flagged |
| Arcadia WaterworksWI6620319 | 3,737 | Ground water | No current violation flagged |
| Waupun Correctional InstWI1140142 | 3,706 | Ground water | Current monitoring/reporting flag |
| Horicon WaterworksWI1140146 | 3,682 | Ground water | No current violation flagged |
| Bloomer WaterworksWI6090448 | 3,680 | Ground water | Other current violation flag |
| Hobart Waterworks S A 1WI4051698 | 3,670 | Surface water purchased | No current violation flagged |
| Omro WaterworksWI4710357 | 3,629 | Ground water | No current violation flagged |
| Combined Locks WaterworksWI4450409 | 3,609 | Ground water purchased | Other current violation flag |
| Black River Falls WaterworksWI6270244 | 3,608 | Ground water | Other current violation flag |
| Seymour WaterworksWI4450337 | 3,601 | Ground water | No current violation flagged |
| Waterloo WaterworksWI1280115 | 3,520 | Ground water | No current violation flagged |
| Sauk City WaterworksWI1570105 | 3,518 | Ground water | No current violation flagged |
| Stanley WaterworksWI6090462 | 3,500 | Ground water | No current violation flagged |
| Barron Light & Water DeptWI6030125 | 3,423 | Ground water | No current violation flagged |
| Peshtigo WaterworksWI4380442 | 3,420 | Ground water | No current violation flagged |
| Mosinee WaterworksWI7370159 | 3,406 | Ground water | Other current violation flag |
| Somerset WaterworksWI6560137 | 3,334 | Ground water | Other current violation flag |
| Johnson Creek WaterworksWI1280107 | 3,318 | Ground water | Other current violation flag |
| Ellsworth WaterworksWI6480239 | 3,304 | Ground water | Current health-based flag |
| Brillion WaterworksWI4080221 | 3,262 | Ground water | No current violation flagged |
| Freedom Sanitary DistrictWI4451607 | 3,260 | Ground water | No current violation flagged |
| Boscobel WaterworksWI1220089 | 3,237 | Ground water | No current violation flagged |
| Wisconsin Dells WaterworksWI1110113 | 3,232 | Ground water | No current violation flagged |
| Algoma WaterworksWI4310280 | 3,219 | Ground water | No current violation flagged |
| Brodhead WaterworksWI1230072 | 3,216 | Ground water | No current violation flagged |
| Rothschild WaterworksWI7370161 | 3,190 | Ground water | Other current violation flag |
| Ladysmith WaterworksWI8550131 | 3,184 | Ground water | No current violation flagged |
| Tomahawk WaterworksWI7350127 | 3,180 | Ground water | Current health-based flag |
| Lodi WaterworksWI1110100 | 3,146 | Ground water | Other current violation flag |
| Sherwood WaterworksWI4080271 | 3,114 | Surface water purchased | No current violation flagged |
| Oostburg WaterworksWI4600445 | 3,110 | Ground water | No current violation flagged |
| Lake Como Sanitary Dist 1WI2651536 | 3,038 | Ground water | No current violation flagged |
| Dry Town055295310 | 3,030 | Ground water | No current violation flagged |
| Hortonville Water UtilityWI4450411 | 3,028 | Ground water | No current violation flagged |
| New Holstein WaterworksWI4080270 | 3,012 | Ground water | No current violation flagged |
| Park Falls WaterworksWI8510130 | 2,993 | Ground water | No current violation flagged |
| Amery WaterworksWI6490328 | 2,962 | Ground water | Current health-based flag |
| Lac Du Flambeau055295401 | 2,962 | Ground water | No current violation flagged |
| Lake Delton WaterworksWI1570664 | 2,914 | Ground water | No current violation flagged |
| Oconto Falls WaterworksWI4430496 | 2,892 | Ground water | No current violation flagged |
| Kewaunee WaterworksWI4310281 | 2,848 | Ground water | No current violation flagged |
| South-Central Water System055295003 | 2,805 | Ground water | No current violation flagged |
| Mendota Mental Health InstWI1130235 | 2,787 | Ground water | Other current violation flag |
| Rome Water UtilityWI7010108 | 2,775 | Ground water | No current violation flagged |
| Genoa City WaterworksWI2650058 | 2,766 | Ground water | No current violation flagged |
| Luxemburg WaterworksWI4310282 | 2,737 | Ground water | No current violation flagged |
| Belleville WaterworksWI1130209 | 2,712 | Ground water | No current violation flagged |
| Lomira WaterworksWI1140151 | 2,701 | Ground water | No current violation flagged |
| Brockway Sanitary Dist 1WI6270299 | 2,692 | Ground water | No current violation flagged |
| Denmark WaterworksWI4050351 | 2,684 | Surface water purchased | No current violation flagged |
| Osceola WaterworksWI6490341 | 2,680 | Ground water | Other current violation flag |
| Mondovi WaterworksWI6060193 | 2,667 | Ground water | No current violation flagged |
| Spooner WaterworksWI8660305 | 2,653 | Ground water | No current violation flagged |
| Juneau WaterworksWI1140058 | 2,627 | Ground water | Current serious-violator flag |
| Williams Bay WaterworksWI2650060 | 2,601 | Ground water | Current monitoring/reporting flag |
| Hayward Water UtilityWI8580532 | 2,552 | Ground water | No current violation flagged |
| New Lisbon WaterworksWI7290132 | 2,526 | Ground water | Other current violation flag |
| Poynette WaterworksWI1110037 | 2,520 | Ground water | No current violation flagged |
| Deerfield WaterworksWI1130223 | 2,510 | Ground water | No current violation flagged |
| Fennimore WaterworksWI1220096 | 2,507 | Ground water | Current monitoring/reporting flag |
| Abbotsford WaterworksWI7370148 | 2,502 | Ground water | Current monitoring/reporting flag |
| Winneconne WaterworksWI4710354 | 2,502 | Ground water | No current violation flagged |
02 / CITY REPORTS
Wisconsin city water-system reports
Wisconsin has 88 city reports meeting the publication threshold for covered systems or reported population served.
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
Wisconsin county water-system reports
Wisconsin has 43 county reports meeting the publication threshold for covered systems or reported population served.
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