Water quality in Oakwood Hills, Illinois
Oakwood Hills is in McHenry County. 307 active public water systems serve the county; 73 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in McHenry County
31 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Aqua Illinois-Nunda |
485 | 0 | 1.8 mi | |
| Prairie Ridge Association |
148 | 0 | 2.1 mi | |
| Cary Cary |
17,826 | 1 | 2.5 mi | |
| IL American-Holiday Hills Holiday Hills |
868 | 0 | 2.6 mi | |
| Oakbrook Estates MHP |
1,012 | 1 | 2.9 mi | |
| Aqua Illinois-Crystal Clear Water Co. |
855 | 1 | 3.3 mi | |
| Fox River Grove Fox River Grove |
4,702 | 0 | 3.7 mi | |
| IL American-Terra Cotta |
681 | 0 | 3.7 mi | |
| IL American-Walk UP Woods |
775 | 3 | 4.7 mi | |
| Aqua Illinois-McHenry Shores |
1,862 | 0 | 4.8 mi | |
| Crystal Lake Crystal Lake |
40,661 | 1 | 4.8 mi | |
| Royal Oaks MHP |
170 | 1 | 5.7 mi | |
| McHenry Mchenry |
22,335 | 2 | 6.4 mi | |
| Aqua Illinois-Eastwood Manor |
728 | 2 | 6.8 mi | |
| Lake in the Hills Lake In The Hills |
28,661 | 1 | 7.2 mi | |
| Algonquin Algonquin |
30,700 | 0 | 7.4 mi | |
| Lakewood Lakewood |
4,267 | 2 | 7.6 mi | |
| Harbor Lites-Pistakee Fshg CL |
132 | 2 | 8.0 mi | |
| Johnsburg No.2 |
1,124 | 3 | 9.5 mi | |
| Johnsburg 1 |
174 | 4 | 9.7 mi | |
| IL American-Whispering Hills |
8,300 | 4 | 10.7 mi | |
| Wonder Lake (niu) |
1,950 | 2 | 11.1 mi | |
| Wonder Lake |
3,870 | 2 | 11.1 mi | |
| Woodstock Woodstock |
25,630 | 3 | 11.2 mi | |
| Huntley Huntley |
28,495 | 1 | 11.5 mi |
Non-community systems in McHenry County (275: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to McHenry County, nearest to Oakwood Hills 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.