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 |
| Ataco Steel Shop | Cedarburg, WI | 120 | 356 | - |
| North Shore Soccer United | Cedarburg, WI | 120 | 14 | - |
| Little Vip Child Care | Wind Lake, WI | 120 | 40 | - |
| Country Rose Bakery | Union Grove, WI | 120 | 21 | - |
| Apple Holler Restaurant | Sturtevant, WI | 120 | 6 | - |
| Lake Geneva Club | Brookfield, WI | 120 | 14 | - |
| Christus Evangelical Lutheran Church | Delavan, WI | 120 | 64 | - |
| Evergreen Country Club - New Clubhouse | Elkhorn, WI | 120 | 0 | - |
| Hahn Ace Hardware | Hartford, WI | 120 | 2 | - |
| La Bell Golf Club | Oconomowoc, WI | 120 | 14 | - |
| Weissgerbers Golden Mast | Okauchee, WI | 120 | 28 | - |
| Milk Can Hamburgers | Nashotah, WI | 120 | 4 | - |
| Camp Double Eagle | Mukwonago, WI | 120 | 18 | - |
| Church of Christ | Waukesha, WI | 120 | 22 | - |
| Steins Gardens & Gifts - Big Bend | Milwaukee, WI | 120 | 11 | - |
| Belgioioso New Denmark | Green Bay, WI | 120 | 8 | - |
| Christian Parents for Kids Day Care | Fond Du Lac, WI | 120 | 217 | - |
| Camp Vista Chapel | Campbellsport, WI | 120 | 10 | - |
| Natural Beauty Growers | Denmark, WI | 120 | 11 | - |
| Specialty Granules LLC Kremlin Plant | Pembine, WI | 120 | 25 | - |
| Joyful Beginnings Academy | Hortonville, WI | 120 | 4 | - |
| Greenville Utilities Vil of/Crestview Subdivision | Greenville, WI | 120 | 0 | - |
| Camp Brosius | Elkhart Lake, WI | 120 | 18 | - |
| Twl Powersports & Marine | Sheboygan, WI | 120 | 4 | - |
| Arrowhead Bible Camp | New Auburn, WI | 120 | 0 | - |
| Camp Decorah 1 - Hagerman Hall | La Crosse, WI | 120 | 8 | - |
| Rockland Industrial Products | Rockland, WI | 120 | 0 | - |
| Plum City Care Center Nursing Home | Plum City, WI | 120 | 24 | - |
| Last Resort Campground | Hastings, WI | 120 | 0 | - |
| Rivers Edge Restaurant | Somerset, WI | 120 | 12 | - |
| Bethel Highlands Lutheran Church | Hudson, WI | 120 | 10 | - |
| Dodge Sanitary Dist 1 | Dodge, WI | 120 | 134 | - |
| Country Road Estates | Ettrick, WI | 120 | 153 | - |
| U S F S Luna White Deer E10 Loop 1 to 9 | Eagle River, WI | 120 | 14 | - |
| U S F S Luna White Deer E12 Campsite 30 | Eagle River, WI | 120 | 6 | - |
| Deer Trail Village | Mosinee, WI | 120 | 399 | - |
| Knowlton House Distillery | Mosinee, WI | 120 | 4 | - |
| Fort Wilderness Gathering Place | McNaughton, WI | 120 | 0 | - |
| Ascension Lutheran Church | Minocqua, WI | 120 | 1 | - |
| North Lakeland Discovery Center Hall | Manitowish Waters, WI | 120 | 21 | - |
| Coons Franklin Lodge Inc | Arbor Vitae, WI | 120 | 25 | - |
| St Germain Community Church | St Germain, WI | 120 | 0 | - |
| Lowenstine Fund Corporation | Land O Lakes, WI | 120 | 2 | - |
| Wood Lake Camp and Retreat Center 4 Tandum | Grantsburg, WI | 120 | 5 | - |
| Little Jump School | Sheldon, WI | 120 | 0 | - |
| Flambeau Correctional Center | Hawkins, WI | 120 | 20 | - |
| St Johns Evangelical Lutheran Church | Oconomowoc, WI | 119 | 10 | - |
| Franklin MHP | Las Vegas, WI | 118 | 55 | - |
| Subway in Wales | Wales, WI | 118 | 0 | - |
| DE Pere Waterworks Sa 2 | DE Pere, WI | 118 | 0 | - |