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 |
|---|---|---|---|---|
| Trinity Lutheran Ch | Howards Grove, WI | 550 | 6 | - |
| Hatley Waterworks | Hatley, WI | 550 | 259 | - |
| Phelps Sanitary District | Phelps, WI | 550 | 136 | - |
| New Auburn Waterworks | New Auburn, WI | 549 | 174 | - |
| Linden Waterworks | Linden, WI | 547 | 23 | - |
| Abundant Life Apostolic Church | Oconomowoc, WI | 543 | 114 | - |
| Farm & Fleet of Dodgeville | Janesville, WI | 540 | 39 | - |
| Section Elementary School | Mukwonago, WI | 540 | 8 | - |
| St Paul Lutheran Early Childhood Center & Church | Sheboygan Falls, WI | 540 | 18 | - |
| Boyd Waterworks | Boyd, WI | 540 | 39 | - |
| Warrens Waterworks | Warrens, WI | 540 | 75 | - |
| WI DNR Crystal Lk Shower | Boulder Junction, WI | 540 | 8 | - |
| Ettrick Waterworks | Ettrick, WI | 536 | 21 | - |
| Devils Head Resort | Merrimac, WI | 535 | 109 | - |
| Burger King Westfield | Sun Prairie, WI | 535 | 103 | - |
| Gresham Waterworks | Gresham, WI | 534 | 236 | - |
| Edgerton I90 Travel Plaza | Edgerton, WI | 533 | 328 | - |
| Richmond School | Sussex, WI | 533 | 5 | - |
| Moorland Golf Center | New Berlin, WI | 533 | 0 | - |
| Merrillan Waterworks | Merrillan, WI | 531 | 112 | - |
| Spacious Acres Mobile Home Community | Menomonie Falls, WI | 525 | 8 | - |
| North Crawford School | Soldiers Grove, WI | 525 | 37 | - |
| WI DNR Council Grnds Entrance Office | Merrill, WI | 525 | 40 | - |
| Melrose Waterworks | Melrose, WI | 524 | 22 | - |
| Country Dale School | Franklin, WI | 523 | 19 | - |
| Amy Belle School | Germantown, WI | 522 | 36 | - |
| Carls Shell/Taco Johns | Edgerton, WI | 520 | 18 | - |
| Capitol Cafe | Brookfield, WI | 520 | 0 | - |
| J J Keller Vinland Plant | Neenah, WI | 520 | 4 | - |
| St Croix Natl Golf Course | Somerset, WI | 520 | 0 | - |
| China One | Ripon, WI | 517 | 0 | - |
| Plymouth Rock Resort Pool 1 | Chicago, WI | 516 | 9 | - |
| Plymouth Rock Resort Main Well | Chicago, WI | 516 | 12 | - |
| Plymouth Rock Resort Pool 3 | Chicago, WI | 516 | 0 | - |
| Plymouth Rock Resort Pool 2 | Chicago, WI | 516 | 12 | - |
| Plymouth Rock Resort 600 Area Well | Chicago, WI | 516 | 0 | - |
| Addison Elementary School | Slinger, WI | 515 | 6 | - |
| Hope Lake Country Church | Delafield, WI | 511 | 0 | - |
| St Francis Borgia Catholic Church | Cedarburg, WI | 510 | 0 | - |
| Waynes Drive-IN | Thiensville, WI | 510 | 0 | - |
| Sunburst Ski Area - Maint Shop | Kewaskum, WI | 510 | 6 | - |
| Lakeview Mart | Fond Du Lac, WI | 510 | 36 | - |
| Adell Waterworks | Adell, WI | 510 | 202 | - |
| Clark Co Health Care Center | Owen, WI | 510 | 136 | - |
| Emanuel Bne Jeshrun Center | River Hills, WI | 509 | 38 | - |
| Mt Zion Christian Church | Lake Geneva, WI | 509 | 434 | Clean |
| Zion Ev Lutheran Church of Leeds | Arlington, WI | 507 | 17 | - |
| Big Bend Elementary School | Mukwonago, WI | 507 | 72 | - |
| Lazy Days Area C & Lower D | West Bend, WI | 506 | 3 | - |
| Withee Waterworks | Withee, WI | 506 | 97 | - |