Water quality in Willow Lake, Illinois
Willow Lake is in Stephenson County. 46 active public water systems serve the county; 22 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 Stephenson County
12 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Cedarville Cedarville |
663 | 1 | 2.9 mi | |
| Freeport Freeport |
23,930 | 0 | 3.0 mi | |
| Timber Ridge Mobile Estates |
150 | 1 | 6.6 mi | |
| Dakota Dakota |
500 | 0 | 6.7 mi | |
| Orangeville Lena |
780 | 0 | 9.3 mi | |
| Pearl City Pearl City |
790 | 4 | 9.4 mi | |
| Rock City Rock City |
293 | 2 | 10.0 mi | |
| Lena Lena |
2,680 | 1 | 10.3 mi | |
| German Valley German Valley |
463 | 0 | 11.4 mi | |
| Davis Davis |
589 | 0 | 12.8 mi | |
| Winslow Winslow |
350 | 4 | 13.7 mi | |
| Stephenson Mobile Estates |
75 | 1 | — |
Non-community systems in Stephenson County (33: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Stephenson County, nearest to Willow Lake 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.
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 Illinois 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.