Water quality in Hanover, Wisconsin
Hanover is in Rock County. 158 active public water systems serve the county; 26 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Rock County
19 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Orfordville Waterworks Orfordville |
1,475 | 0 | 4.6 mi | |
| Caravilla Education and Rehab Center Janesville |
298 | 4 | 8.3 mi | |
| Janesville Water Utility Janesville |
64,415 | 0 | 8.5 mi | |
| Rockvale MHP Janesville |
1,200 | 0 | 8.7 mi | |
| Mountain View MHP 1 Evansville |
50 | 1 | 9.0 mi | |
| Midway Village Mobile Home Park Evansville |
160 | 4 | 10.4 mi | |
| Beloit City of Beloit |
36,677 | 1 | 10.9 mi | |
| Birchwood Trailer Court Evansville |
32 | 1 | 11.5 mi | |
| Mountain View MHP 2 Evansville |
25 | 1 | 11.5 mi | |
| Evansville Waterworks Evansville |
5,703 | 2 | 11.5 mi | |
| Oakhill Waterworks Edgerton |
130 | 1 | 14.4 mi | |
| Edgerton Waterworks Edgerton |
5,512 | 2 | 14.6 mi | |
| Rock River Leisure Estates Coop Edgerton |
650 | 3 | 14.7 mi | |
| Fulton Utility District Edgerton |
200 | 3 | 14.8 mi | |
| Milton Waterworks Milton |
5,588 | 0 | 14.8 mi | |
| Clinton Waterworks Clinton |
2,119 | 0 | 16.4 mi | |
| Shady Hill Mobile Home Park Clinton |
140 | 3 | 16.7 mi | |
| County Line Estates Whitewater |
240 | 1 | 23.5 mi | |
| Pirates Cove Mobile Home Community Edgerton |
25 | 2 | 29.2 mi |
Non-community systems in Rock County (138: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Rock County, nearest to Hanover 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.