Water quality in Winnebago, Wisconsin
Winnebago is in Winnebago County. 146 active public water systems serve the county; 29 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Winnebago County
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Neenah Waterworks Neenah |
27,506 | 0 | |
| Menasha Elec & Water Util Menasha |
15,144 | 1 | |
| Fox Crossing Utilities West Neenah |
14,000 | 2 | |
| Fox Crossing Utilities East Neenah |
10,927 | 2 | |
| Algoma TN Sanitary Dist 1 Oshkosh |
3,935 | 0 | |
| Omro Waterworks Omro |
3,629 | 1 | |
| Winneconne Waterworks Winneconne |
2,502 | 4 | |
| Winnebago Area Sanitary District Winnebago |
90 | 0 | |
| Rolling Meadows of Larsen LLC Larsen |
85 | 0 | |
| Willow Pines Mfd Home Community Winchester |
70 | 0 |
Non-community systems in Winnebago County (135: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Winnebago County, largest 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.
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.