Water quality in Winthrop Harbor, Illinois
Winthrop Harbor is in Lake County. 535 active public water systems serve the county; 213 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 Lake County
102 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Zion Zion |
24,442 | 3 | 2.3 mi | |
| Beach MHP Zion |
624 | 1 | 4.0 mi | |
| Lake View MHP |
568 | 1 | 4.3 mi | |
| Beach Park Beach Park |
8,710 | 0 | 4.3 mi | |
| Wadsworth Oaks Subdivision |
185 | 1 | 6.4 mi | |
| Waukegan Waukegan |
87,149 | 3 | 8.1 mi | |
| Park City MHP Park City |
2,460 | 1 | 9.4 mi | |
| Gurnee Gurnee |
30,193 | 0 | 9.6 mi | |
| Park City Park City |
5,425 | 3 | 9.9 mi | |
| Grandwood Park Subdivision Lake CO PW |
5,751 | 0 | 10.0 mi | |
| Lindenhurst Lindenhurst |
14,500 | 3 | 11.3 mi | |
| Great Lakes Naval Training Station North Chicago |
23,000 | 0 | 11.5 mi | |
| North Chicago North Chicago |
16,813 | 4 | 11.6 mi | |
| Bluff Lake Lodges, Inc. Antioch |
24 | 8 | 12.4 mi | |
| Whispering Lakes Water System, Inc. |
375 | 1 | 12.7 mi | |
| Heiden Gardens Condos |
217 | 1 | 12.8 mi | |
| Wildwood Subdivision Lake CO PW |
14,073 | 1 | 12.8 mi | |
| Lake Co. PW Arden Shores Estates |
105 | 0 | 13.0 mi | |
| Green Oaks Green Oaks |
1,470 | 3 | 13.5 mi | |
| Lake Villa Lake Villa |
8,829 | 1 | 13.7 mi | |
| Lake Bluff Estates MHP Lake Bluff |
165 | 1 | 13.8 mi | |
| Central Lake County Jawa Lake Bluff |
0 | 0 | 13.8 mi | |
| Antioch Antioch |
14,175 | 2 | 14.1 mi | |
| Lake Bluff Lake Bluff |
5,600 | 2 | 14.1 mi | |
| Grayslake Grays Lake |
21,248 | 0 | 14.1 mi |
Non-community systems in Lake County (432: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lake County, nearest to Winthrop Harbor 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 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.