Water quality in Williams Bay, Wisconsin
Williams Bay is in Walworth County. 251 active public water systems serve the county; 66 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Walworth County
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Inspiration Ministries & Meadows Apts Walworth |
80 | 0 | 1.7 mi | |
| Geneva National Community Services Lake Geneva |
2,250 | 0 | 2.2 mi | |
| Fontana Water Utility Fontana |
1,839 | 2 | 2.9 mi | |
| Westshire Farms at the Lakes Delavan |
300 | 0 | 3.2 mi | |
| Lake Como Sanitary Dist 1 Lake Geneva |
3,038 | 0 | 3.3 mi | |
| Interlaken Resort and Village Lake Geneva |
500 | 0 | 3.4 mi | |
| Coachmans Terrace MHP Lake Geneva |
125 | 1 | 3.7 mi | |
| Walworth Waterworks Walworth |
2,304 | 2 | 4.3 mi | |
| Delavan Club Condos Delavan |
395 | 1 | 4.4 mi | |
| Vintage on the Ponds Delavan |
60 | 2 | 5.6 mi | |
| Geneva Landings Delavan |
25 | 0 | 5.6 mi | |
| Delavan Waterworks Delavan |
9,028 | 1 | 5.8 mi | |
| Sage Meadow of Lake Geneva Lake Geneva |
33 | 1 | 5.9 mi | |
| Lake Geneva Utility Commission Lake Geneva |
7,107 | 1 | 6.0 mi | |
| Ludwell Estates Elkhorn |
100 | 6 | 6.1 mi | |
| Elkhorn Waterworks Elkhorn |
10,317 | 1 | 6.4 mi | |
| Pioneer Estates of Delavan Delavan |
400 | 0 | 8.0 mi | |
| Country Estates Sanitary District Town of Lyons 1 Burlington |
500 | 0 | 8.9 mi | |
| Darien Waterworks Darien |
1,573 | 0 | 9.2 mi | |
| Bloomfield, Village of Pell Lake |
4,071 | 5 | 9.9 mi | |
| Sharon Waterworks Sharon |
1,549 | 4 | 10.9 mi | |
| Town Hall Apts Delavan |
90 | 0 | 12.0 mi | |
| Snug Harbor Inn MHP Delavan |
30 | 1 | 12.1 mi | |
| Genoa City Waterworks Genoa City |
2,766 | 2 | 12.4 mi | |
| East Troy Waterworks East Troy |
5,054 | 0 | 16.0 mi |
Non-community systems in Walworth County (221: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Walworth County, nearest to Williams Bay first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Wisconsin records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.