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 |
|---|---|---|---|---|
| Mattoon Waterworks | Mattoon, WI | 450 | 172 | - |
| Cochrane Waterworks | Cochrane, WI | 450 | 16 | - |
| Scouting America Camp Mkjw West Camp 1 | Pearson, WI | 450 | 10 | - |
| Scouting America Mkjw West Camp 2 | Pearson, WI | 450 | 0 | - |
| WI DNR Clear Lk Cmpgd 24 | Boulder Junction, WI | 450 | 0 | - |
| WI DNR Clear Lk Cmpgd 23 | Boulder Junction, WI | 450 | 4 | - |
| WI DNR Clear Lk Cmpgd 10 | Boulder Junction, WI | 450 | 0 | - |
| WI DNR Clear Lk Cmpgd 9 | Boulder Junction, WI | 450 | 0 | - |
| WI DNR Clear Lk Cmpgd 8 | Boulder Junction, WI | 450 | 0 | - |
| WI DNR Clear Lk Cmpgd 7 | Boulder Junction, WI | 450 | 0 | - |
| McCain Foods USA | Wisconsin Rapids, WI | 450 | 56 | - |
| Land O Lakes Sanitary Dist | Land O Lakes, WI | 450 | 433 | - |
| Camp Forest Springs Forest Clearing Mini Farm | Westboro, WI | 450 | 0 | - |
| St Alphonsus Catholic Church | New Munster, WI | 449 | 26 | - |
| Northwestern High School | Maple, WI | 448 | 14 | - |
| Willow Springs MHP 2 & 3 | Barrington, WI | 446 | 49 | - |
| Holcombe High School | Holcombe, WI | 445 | 147 | - |
| Burger King | Chicago, WI | 443 | 10 | - |
| Fountain City Waterworks | Fountain City, WI | 443 | 62 | - |
| Hixton Waterworks | Hixton, WI | 443 | 218 | - |
| Birchwood Waterworks | Birchwood, WI | 442 | 96 | - |
| Merrimac Waterworks | Merrimac, WI | 440 | 85 | - |
| WI DOT Rest Area 16 Sparta | Madison, WI | 440 | 91 | - |
| St Gabriel School-Parish | Hubertus, WI | 438 | 20 | - |
| Saputo Cheese USA Inc Waupun | Waupun, WI | 435 | 41 | - |
| Northview Elementary School | Howards Grove, WI | 435 | 15 | - |
| Trinity Ev Lutheran Church & School | Marshfield, WI | 430 | 142 | - |
| Mill Valley School | Muskego, WI | 426 | 25 | - |
| Sextonville Waterworks | Sextonville, WI | 425 | 74 | - |
| Blue River Waterworks | Blue River, WI | 424 | 35 | - |
| Clyman Waterworks | Clyman, WI | 422 | 171 | - |
| Silver Birch Ranch Dorms | White Lake, WI | 422 | 2 | - |
| North Hills MHP | Barrington, WI | 420 | 59 | - |
| International Crane Foundation Gateway Visitors | Baraboo, WI | 420 | 0 | - |
| St Francis Borgia Educational & Activity Center | Cedarburg, WI | 420 | 0 | - |
| Elm Grove Lutheran School & Church | Elm Grove, WI | 420 | 34 | - |
| Laconia Elementary School | Rosendale, WI | 420 | 21 | - |
| Villa Diann MHP | San Francisco, WI | 420 | 76 | - |
| Silver Birch Ranch Horse Bldg and Dining Hall | White Lake, WI | 420 | 0 | - |
| Almond-Bancroft Public Schools | Almond, WI | 420 | 27 | - |
| Hancock Waterworks | Hancock, WI | 419 | 119 | - |
| Bear Creek Waterworks | Bear Creek, WI | 418 | 148 | - |
| Junction City Waterworks | Junction City, WI | 416 | 16 | - |
| Fox & Hounds Restaurant - Kitchen | Hartford, WI | 415 | 4 | - |
| Fox & Hounds Restaurant - Bar | Hartford, WI | 415 | 12 | - |
| Sunrise Orchards | Gay Mills, WI | 415 | 4 | - |
| Crawfish Junction | Johnson Creek, WI | 412 | 0 | - |
| Station 51 LLC | Janesville, WI | 412 | 2 | - |
| Peace Lutheran Church | Green Bay, WI | 411 | 204 | - |
| Sunset Harbor | Lodi, WI | 410 | 20 | - |