Wisconsin utilities 101 to 205.
Each serves 40 to 9,028 people, as it reports to EPA. Your ZIP code finds yours faster.
101 to 205 of 205, by people served
| Utility | Based in | Serves | Regulated PFAS | Health-based violations since 2016 |
|---|---|---|---|---|
| Delavan Waterworks | Delavan | 9,028 | None found | 0 |
| Rice Lake Waterworks | Rice Lake | 9,012 | None found | 0 |
| Plymouth Utilities | Plymouth | 8,964 | None found | 0 |
| Sheboygan Falls Utilities | Sheboygan Falls | 8,687 | None found | 0 |
| Pewaukee City Water and Sewer Utility | Pewaukee | 8,671 | PFOA, PFOS, PFHxS, PFBS | 17 |
| Monona Waterworks | Monona | 8,624 | PFHxS, PFBS | 0 |
| Rhinelander Water & Wastewater | Rhinelander | 8,234 | PFOA | 1 |
| Mukwonago Waterworks | Mukwonago | 8,190 | None found | 0 |
| Pewaukee Village Waterworks | Pewaukee | 8,166 | None found | 23 |
| Muskego Water Utility | Muskego | 8,150 | None found | 1 |
| Waupun Utilities | Waupun | 8,056 | None found | 0 |
| Ashland Water Utility | Ashland | 8,000 | None found | 12 |
| Jefferson Waterworks | Jefferson | 7,926 | None found | 7 |
| Jackson Waterworks | Jackson | 7,844 | None found | 1 |
| Antigo Waterworks | Antigo | 7,780 | None found | 5 |
| MT Horeb Waterworks | Mount Horeb | 7,756 | PFHxS | 0 |
| Ripon Water Utility | Ripon | 7,716 | None found | 1 |
| Kimberly Waterworks | Kimberly | 7,608 | None found | 1 |
| Ledgeview TN Sanitary Dist 2 | De Pere | 7,602 | None found | 2 |
| New London Waterworks | New London | 7,187 | None found | 0 |
| Lake Geneva Utility Commission | Lake Geneva | 7,107 | PFOA, PFHxS, PFBS | 0 |
| Kronenwetter Water & Sewer Utility | Kronenwetter | 6,931 | None found | 1 |
| Fox Point Waterworks | Fox Point | 6,808 | None found | 0 |
| Village of Lake Hallie Waterworks | Chippewa Falls | 6,701 | None found | 1 |
| Town of Brookfield San Dist 4 | Brookfield | 6,419 | PFBS | 0 |
| Rib Mountain Water Utility | Wausau | 6,398 | PFOA, PFOS, PFHxS, PFBS | 0 |
| Lake Mills Waterworks | Lake Mills | 6,211 | None found | 6 |
| Waupaca Waterworks | Waupaca | 6,062 | PFOS, PFBS | 1 |
| Prairie Du Chien Waterworks | Prairie Du Chien | 6,005 | PFOS, PFHxS | 0 |
| Evansville Waterworks | Evansville | 5,703 | None found | 6 |
| Slinger Water Utility | Slinger | 5,659 | PFHxS | 1 |
| Milton Waterworks | Milton | 5,588 | None found | 1 |
| Berlin Waterworks | Berlin | 5,524 | None found | 0 |
| Edgerton Waterworks | Edgerton | 5,512 | None found | 2 |
| Harrison Utilities - Fka Waverly SD | Menasha | 5,500 | None found | 0 |
| North Fond Du Lac Waterworks | North Fond Du Lac | 5,414 | None found | 2 |
| Lawrence Waterworks | De Pere | 5,398 | None found | 0 |
| Waterford Waterworks | Waterford | 5,368 | None found | 1 |
| Sand Pillow | Black River Falls | 5,230 | Not sampled | 0 |
| Columbus Utilities | Columbus | 5,173 | None found | 2 |
| Mayville Waterworks | Mayville | 5,112 | None found | 0 |
| Richland Center Waterworks | Richland Center | 5,100 | None found | 1 |
| East Troy Waterworks | East Troy | 5,054 | PFBS | 0 |
| West Salem Waterworks | West Salem | 5,045 | None found | 0 |
| Shawano Lk San Dist 1 | Shawano | 4,950 | None found | 1 |
| Union Grove Waterworks | Union Grove | 4,900 | None found | 1 |
| Suamico Waterworks | Suamico | 4,697 | None found | 1 |
| Clintonville Utilities | Clintonville | 4,635 | None found | 1 |
| Windsor Water Utility South | Windsor | 4,607 | Not sampled | 0 |
| Sheboygan TN Waterworks | Sheboygan | 4,596 | PFHxS, PFBS | 0 |
| Dodgeville Waterworks | Dodgeville | 4,583 | None found | 0 |
| Oconto Waterworks | Oconto | 4,583 | None found | 2 |
| Mauston Waterworks | Mauston | 4,456 | None found | 1 |
| Baldwin Waterworks | Baldwin | 4,440 | None found | 0 |
| Oneida #1 Or Site #1 | Oneida | 4,393 | None found | 0 |
| Viroqua Waterworks | Viroqua | 4,362 | None found | 0 |
| Medford Waterworks | Medford | 4,318 | PFOA, PFHxS | 0 |
| Kewaskum Waterworks | Kewaskum | 4,309 | PFOA, PFBS | 0 |
| Saukville Waterworks | Saukville | 4,268 | PFOA, PFOS, PFHxS, PFBS | 0 |
| Prescott Waterworks | Prescott | 4,258 | PFOA, PFHxS, PFBS | 1 |
| Chilton Waterworks | Chilton | 4,191 | None found | 1 |
| Cross Plains Waterworks | Cross Plains | 4,100 | None found | 0 |
| Village of Bloomfield | Pell Lake | 4,071 | None found | 3 |
| Pulaski Waterworks | Pulaski | 4,040 | None found | 0 |
| Prairie Du Sac Waterworks | Prairie Du Sac | 4,006 | None found | 1 |
| Keshena | Keshena | 3,960 | None found | 0 |
| Algoma TN Sanitary Dist 1 | Oshkosh | 3,935 | Not sampled | 0 |
| Kiel Waterworks | Kiel | 3,932 | None found | 1 |
| Lancaster Waterworks | Lancaster | 3,907 | None found | 0 |
| Marshall Waterworks | Marshall | 3,862 | None found | 1 |
| Wrightstown Waterworks | Wrightstown | 3,815 | Not sampled | 1 |
| Arcadia Waterworks | Arcadia | 3,737 | Not sampled | 0 |
| Waupun Correctional Inst | Waupun | 3,706 | None found | 6 |
| Horicon Waterworks | Horicon | 3,682 | None found | 1 |
| Bloomer Waterworks | Bloomer | 3,680 | None found | 1 |
| Hobart Waterworks S A 1 | Hobart | 3,670 | Not sampled | 0 |
| Omro Waterworks | Omro | 3,629 | None found | 0 |
| Combined Locks Waterworks | Combined Locks | 3,609 | None found | 1 |
| Black River Falls Waterworks | Black River Falls | 3,608 | None found | 1 |
| Seymour Waterworks | Seymour | 3,601 | None found | 0 |
| Waterloo Waterworks | Waterloo | 3,520 | None found | 3 |
| Sauk City Waterworks | Sauk City | 3,518 | None found | 0 |
| Stanley Waterworks | Stanley | 3,500 | None found | 1 |
| Barron Light & Water Dept | Barron | 3,423 | None found | 0 |
| Peshtigo Waterworks | Peshtigo | 3,420 | None found | 0 |
| Mosinee Waterworks | Mosinee | 3,406 | Not sampled | 0 |
| Somerset Waterworks | Somerset | 3,334 | Not sampled | 1 |
| Johnson Creek Waterworks | Johnson Creek | 3,318 | Not sampled | 1 |
| Ellsworth Waterworks | Ellsworth | 3,304 | None found | 1 |
| Brillion Waterworks | Brillion | 3,262 | None found | 1 |
| Tomahawk Waterworks | Tomahawk | 3,180 | PFOA | 1 |
| Lac Du Flambeau | Lac Du Flambeau | 2,962 | PFBS | 0 |
| South - Central Water System | Bowler | 2,805 | None found | 0 |
| Denmark Waterworks | Denmark | 2,684 | None found | 1 |
| Schofield Waterworks | Schofield | 2,205 | PFOA, PFHxS, PFBS | 0 |
| Clinton Waterworks | Clinton | 2,119 | None found | 0 |
| Somers Water Utility | Somers | 1,930 | None found | 0 |
| Palmyra Waterworks | Palmyra | 1,756 | PFOS, PFHxS | 0 |
| Shullsburg Waterworks | Shullsburg | 1,222 | None found | 0 |
| Hilbert Waterworks | Hilbert | 1,176 | None found | 0 |
| Arena Waterworks | Arena | 877 | None found | 0 |
| Bloomington Waterworks | Bloomington | 682 | None found | 0 |
| Forest Junction Pub Util | Forest Junction | 487 | None found | 1 |
| Pikes Bay Marina | Bayfield | 45 | None found | 0 |
| Mauston Green Acres | Mauston | 40 | None found | 0 |
Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.
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