Water quality in Darien, Wisconsin
Darien 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
Other community water systems in Walworth County
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Pioneer Estates of Delavan Delavan |
400 | 0 | 2.6 mi | |
| Delavan Waterworks Delavan |
9,028 | 1 | 5.4 mi | |
| Vintage on the Ponds Delavan |
60 | 2 | 5.8 mi | |
| Geneva Landings Delavan |
25 | 0 | 5.8 mi | |
| Delavan Club Condos Delavan |
395 | 1 | 6.4 mi | |
| Sharon Waterworks Sharon |
1,549 | 4 | 7.9 mi | |
| Westshire Farms at the Lakes Delavan |
300 | 0 | 8.4 mi | |
| Snug Harbor Inn MHP Delavan |
30 | 1 | 8.5 mi | |
| Inspiration Ministries & Meadows Apts Walworth |
80 | 0 | 9.0 mi | |
| Ludwell Estates Elkhorn |
100 | 6 | 9.0 mi | |
| Walworth Waterworks Walworth |
2,304 | 2 | 9.3 mi | |
| Fontana Water Utility Fontana |
1,839 | 2 | 10.0 mi | |
| Town Hall Apts Delavan |
90 | 0 | 10.3 mi | |
| Williams Bay Waterworks Williams Bay |
2,601 | 2 | 10.4 mi | |
| Elkhorn Waterworks Elkhorn |
10,317 | 1 | 10.6 mi | |
| Geneva National Community Services Lake Geneva |
2,250 | 0 | 11.3 mi | |
| Lake Como Sanitary Dist 1 Lake Geneva |
3,038 | 0 | 12.5 mi | |
| Interlaken Resort and Village Lake Geneva |
500 | 0 | 13.3 mi | |
| Coachmans Terrace MHP Lake Geneva |
125 | 1 | 13.7 mi | |
| Whitewater Waterworks Whitewater |
14,000 | 2 | 15.1 mi | |
| Sage Meadow of Lake Geneva Lake Geneva |
33 | 1 | 16.0 mi | |
| Lake Geneva Utility Commission Lake Geneva |
7,107 | 1 | 16.1 mi | |
| Country Estates Sanitary District Town of Lyons 1 Burlington |
500 | 0 | 17.5 mi | |
| Troy Center Sanitary District Troy Center |
170 | 0 | 19.5 mi | |
| Bloomfield, Village of Pell Lake |
4,071 | 5 | 20.2 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 Darien 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.