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.
| System Name | Location | Population | Violations | PFAS |
| Pilgrim Place Office Park | Delafield, WI | 90 | 57 | - |
| Picnic Basket Nashotah | Nashotah, WI | 90 | 2 | - |
| Angels Grace Hospice | Oconomowoc, WI | 90 | 0 | - |
| Shoreline Resort | Green Bay, WI | 90 | 51 | - |
| Quiet Country Community Assn | Two Rivers, WI | 90 | 45 | - |
| Gregg Young Cdjr Abrams | Abrams, WI | 90 | 0 | - |
| Rustic Acres MHP | Costa Mesa, WI | 90 | 81 | - |
| Camp Nan a Bo Sho Med Bldg | Lakewood, WI | 90 | 12 | - |
| Comfort Inn and Suites | Sheboygan, WI | 90 | 0 | - |
| Little Silver Lake South | Wild Rose, WI | 90 | 2 | - |
| J J Keller North Park Office | Neenah, WI | 90 | 4 | - |
| Quality Paint & Coatings Oshkosh | Oshkosh, WI | 90 | 6 | - |
| Winnebago Area Sanitary District | Oshkosh, WI | 90 | 1 | - |
| St Pauls Evangelical Church | Ridgeland, WI | 90 | 20 | - |
| Camp Phillips Boy Scouts 3 Sourdough | Eau Claire, WI | 90 | 1 | - |
| Camp Phillips Boy Scouts 5 Thunderbird | Eau Claire, WI | 90 | 5 | - |
| Riverview Park | Colfax, WI | 90 | 37 | - |
| Isle Bay Resort | Holcombe, WI | 90 | 0 | - |
| Keystone New Life Alliance Church | Cornell, WI | 90 | 5 | - |
| Loyal Order of Moose Lodge 1408 | Eau Claire, WI | 90 | 5 | - |
| WI Christian Yth Cmp Great Hall | Black River Falls, WI | 90 | 4 | - |
| Netties Volta | Hager City, WI | 90 | 0 | - |
| Bone Lake Lutheran Church | Luck, WI | 90 | 28 | - |
| Assumption Catholic Church | Somerset, WI | 90 | 13 | - |
| Rolling Hills MHP LLC | Minneapolis, WI | 90 | 684 | - |
| Bad Axe Lutheran Church | Viroqua, WI | 90 | 23 | - |
| Ponderosa Pines - Campground 2 | Stevens Point, WI | 90 | 0 | - |
| Kountry Aire Est MHP I | Colfax, WI | 90 | 13 | - |
| Land O Lakes Bible Church | Land O Lakes, WI | 90 | 25 | - |
| S and J Wild River MHP | Hayward, WI | 90 | 644 | - |
| Ebenezer Moravian Church | Watertown, WI | 89 | 35 | - |
| St Vincent de Paul Country Thrift Store | Milwaukee, WI | 89 | 6 | - |
| Duesterbecks Brewing Company | Delavan, WI | 89 | 0 | - |
| Huntington Bank | Skokie, WI | 89 | 0 | - |
| Barringers | Fish Creek, WI | 89 | 4 | - |
| Yellowstone Cheese LLC | Cadott, WI | 89 | 15 | - |
| Veritas Steel 1 | Wausau, WI | 89 | 39 | - |
| Veritas Steel 2 | Wausau, WI | 89 | 53 | - |
| Punch Lake Campground | Arbor Vitae, WI | 89 | 0 | - |
| Econo Lodge | Lake Mills, WI | 88 | 19 | - |
| Koshkonong Mounds Country Club Bear Trap | Fort Atkinson, WI | 88 | 4 | - |
| Lakecrest Shores LLC | Chicago, WI | 88 | 18 | - |
| Highland Colony Estates Condo | Mequon, WI | 88 | 11 | - |
| Lakeside Development East & West Bldgs | Mequon, WI | 88 | 84 | - |
| Kingdom Hall of Jehovahs Witnesses Burlingto | Burlington, WI | 88 | 14 | - |
| American Legion Post 1 | Germantown, WI | 88 | 10 | - |
| Cut | Fish Creek, WI | 88 | 73 | - |
| Jordan Lutheran Church | South Wayne, WI | 87 | 0 | - |
| St Peters Lutheran School | Helenville, WI | 87 | 39 | - |
| Norman Office Building C | Richland Center, WI | 87 | 23 | - |