Water quality in Grayslake, Illinois
Grayslake 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 |
|---|---|---|---|---|
| Hainesville Hainesville |
3,528 | 1 | 1.7 mi | |
| Lcpw Highland Lake Subdivision |
414 | 0 | 2.3 mi | |
| Wildwood Subdivision Lake CO PW |
14,073 | 1 | 2.4 mi | |
| Round Lake Park Round Lake Park |
4,900 | 4 | 2.5 mi | |
| Saddlebrook Farms |
2,558 | 1 | 2.9 mi | |
| Round Lake Beach Round Lake Beach |
27,200 | 2 | 3.7 mi | |
| Round Lake Round Lake |
18,430 | 2 | 3.7 mi | |
| Chain-O-Lakes MHP |
84 | 0 | 3.9 mi | |
| Cambridge Courts MHP Northbrook |
658 | 2 | 4.2 mi | |
| Aqua Illinois-Ivanhoe |
650 | 0 | 4.3 mi | |
| Grandwood Park Subdivision Lake CO PW |
5,751 | 0 | 4.6 mi | |
| Round Lake Heights Round Lake Heights |
2,622 | 0 | 4.8 mi | |
| Libertyville Libertyville |
20,500 | 1 | 5.1 mi | |
| Dayspring Bible College Mundelein |
30 | 1 | 5.1 mi | |
| Gurnee Gurnee |
30,193 | 0 | 5.2 mi | |
| Mundelein Mundelein |
31,500 | 1 | 5.3 mi | |
| Lcpw Brooks Farm Subdivision |
1,563 | 0 | 5.4 mi | |
| Lake Villa Lake Villa |
8,829 | 1 | 5.5 mi | |
| Lindenhurst Lindenhurst |
14,500 | 3 | 5.5 mi | |
| Tanneron Bay Homeowners Association |
256 | 1 | 6.0 mi | |
| Countryside Lake Subdivision -Lake CO PW |
1,287 | 0 | 6.0 mi | |
| West Shoreland Subdivision |
189 | 0 | 6.1 mi | |
| West Shore Park Subdivision |
590 | 2 | 6.2 mi | |
| Volo Volo |
6,629 | 2 | 6.4 mi | |
| Duck Lake Well Owners Association |
141 | 4 | 6.5 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 Grayslake 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.