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 |
|---|---|---|---|---|
| Hustisford Waterworks | Hustisford, WI | 1,063 | 132 | - |
| Clear Lake Waterworks | Clear Lake, WI | 1,061 | 76 | - |
| Oakfield Waterworks | Oakfield, WI | 1,058 | 37 | - |
| Loves Travel Stops Poynette | Oklahoma City, WI | 1,051 | 0 | - |
| Ashwood Grove Edgewater | Fond Du Lac, WI | 1,046 | 7 | - |
| Mosinee East System | Mosinee, WI | 1,046 | 0 | - |
| Boyceville Waterworks | Boyceville, WI | 1,043 | 58 | - |
| McDonalds Westfield | Onalaska, WI | 1,040 | 71 | - |
| Balsam Lake Waterworks | Balsam Lake, WI | 1,031 | 42 | - |
| Crivitz Waterworks | Crivitz, WI | 1,026 | 256 | - |
| Athens Waterworks | Athens, WI | 1,025 | 170 | - |
| Shelby TN of Wedgewood Vly | La Crosse, WI | 1,020 | 15 | - |
| Albany Waterworks | Albany, WI | 1,018 | 31 | - |
| Green Lake Waterworks | Green Lake, WI | 1,002 | 53 | - |
| Bristol Village of East | Bristol, WI | 1,001 | 41 | - |
| Sister Bay Waterworks | Sister Bay, WI | 1,000 | 9 | - |
| Seven Mile Fair Expo Bldg | Caledonia, WI | 999 | 124 | - |
| Seven Mile Fair Market Square | Caledonia, WI | 999 | 240 | - |
| Belmont Waterworks | Belmont, WI | 991 | 37 | - |
| Fond Du Lac TN Water Utility | Fond Du Lac, WI | 980 | 26 | - |
| Benton Waterworks | Benton, WI | 976 | 73 | - |
| Cascade Mtn Ski - 93 Well Main | Portage, WI | 967 | 0 | - |
| Valders Waterworks | Valders, WI | 954 | 18 | - |
| Blue Mounds Waterworks | Blue Mounds, WI | 950 | 39 | - |
| Southern Wisconsin Center | Union Grove, WI | 950 | 293 | - |
| Pilgrim Park Middle School | Elm Grove, WI | 950 | 281 | - |
| Laona Sanitary Dist | Laona, WI | 950 | 229 | - |
| Shell Lake Waterworks | Shell Lake, WI | 950 | 88 | - |
| Paddock Lake Waterworks | Salem, WI | 945 | 115 | - |
| Rib Lake Waterworks | Rib Lake, WI | 945 | 43 | - |
| Siren Waterworks | Siren, WI | 941 | 51 | - |
| Iron Ridge Waterworks | Iron Ridge, WI | 937 | 7 | - |
| Owen Waterworks | Owen, WI | 936 | 4 | - |
| Dresser Waterworks | Dresser, WI | 936 | 43 | - |
| Plainfield Waterworks | Plainfield, WI | 924 | 43 | - |
| Shiocton Utilities | Shiocton, WI | 921 | 17 | - |
| Cedar Lake Speedway-West Well | Lake Elmo, WI | 919 | 7 | - |
| Cedar Lake Speedway-East Well | Lake Elmo, WI | 919 | 18 | - |
| Petro Travel Plaza #403 | Westlake, WI | 915 | 25 | - |
| Milltown Waterworks | Milltown, WI | 915 | 47 | - |
| Seven Mile Fair Pumphouse Well | Caledonia, WI | 914 | 16 | - |
| Pride of America Campground - Main System Wells 1 2 and 4 | Pardeeville, WI | 912 | 8 | - |
| Walgreens in Mequon | Waukesha, WI | 912 | 0 | - |
| Kwik Trip 360 Oconomowoc | La Crosse, WI | 906 | 0 | - |
| WI DNR Devils Lake South Picnic Area | Baraboo, WI | 900 | 46 | - |
| Centuria Waterworks | Centuria, WI | 900 | 24 | - |
| Brakebush Bros Inc | Westfield, WI | 898 | 14 | - |
| Lone Rock Waterworks | Lone Rock, WI | 895 | 52 | - |
| Elk Mound Waterworks | Elk Mound, WI | 895 | 11 | - |
| Northwestern Elementary and Middle School | Maple, WI | 890 | 13 | - |