Water quality in Onalaska, Wisconsin
Onalaska is in La Crosse County. 122 active public water systems serve the county; 21 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in La Crosse County
20 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Innsbruck Water Trust West Salem |
85 | 0 | 2.7 mi | |
| Onalaska Waterworks Onalaska |
18,000 | 0 | 4.5 mi | |
| Bostwick Valley MHP West Salem |
240 | 2 | 4.9 mi | |
| Bluffview Commons La Crosse |
140 | 1 | 7.4 mi | |
| Bangor Waterworks Bangor |
1,520 | 0 | 7.5 mi | |
| Town of Farmington Sanitary District Mindoro |
275 | 3 | 7.5 mi | |
| Island Estates La Crosse |
50 | 3 | 7.8 mi | |
| Shelby TN of SD 2 Arbor HL La Crosse |
231 | 0 | 7.9 mi | |
| LA Crosse Waterworks La Crosse |
53,000 | 0 | 8.2 mi | |
| Shelby TN of Wedgewood Vly La Crosse |
1,020 | 0 | 8.7 mi | |
| ST Joseph San Dist 1 La Crosse |
503 | 0 | 9.8 mi | |
| Shelby TN of SD 2 Skyline La Crosse |
156 | 0 | 9.8 mi | |
| Holmen Waterworks Holmen |
10,147 | 2 | 10.5 mi | |
| Coulee Manor Trailer Park La Crosse |
39 | 3 | 10.9 mi | |
| LA Crosse Estates LLC La Crosse |
351 | 0 | 10.9 mi | |
| Rockland Waterworks Rockland |
642 | 3 | 11.0 mi | |
| Coulee Creek Estates BV La Crosse |
300 | 0 | 11.2 mi | |
| Coulee Creek Estates GV La Crosse |
80 | 0 | 11.2 mi | |
| Green Oaks Mobile Home Court Holmen |
117 | 0 | 12.7 mi | |
| Battlestone Station Condos Lacrosse |
40 | 1 | — |
Non-community systems in La Crosse County (101: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to La Crosse County, nearest to Onalaska 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.