Water quality in Janesville, Illinois
Janesville is in Coles County. 16 active public water systems serve the county; 10 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Coles County
9 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Charleston Charleston |
17,286 | 5 | 8.1 mi | |
| Longacre Estates MHP |
375 | 0 | 8.7 mi | |
| Mattoon Mattoon |
19,500 | 0 | 9.6 mi | |
| Clear Water Service Corp |
8,900 | 2 | 10.3 mi | |
| Embarras Area Water District |
3,750 | 0 | 12.1 mi | |
| Cooks Mills Water Association |
720 | 1 | 12.7 mi | |
| Ashmore Ashmore |
637 | 8 | 16.0 mi | |
| Humboldt Humboldt |
361 | 0 | 16.3 mi | |
| Oakland Oakland |
739 | 3 | 23.0 mi |
Non-community systems in Coles County (6: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Walmart Mattoon |
50 | 0 | 0 | |
|
Walmart Supercenter #0612 |
25 | 0 | 0 | |
|
Shiney Hiney Wash CO |
35 | 1 | 0 | |
|
Champion Ice Mattoon |
25 | 2 | 1 | |
|
County Market #450 |
25 | 2 | 1 | |
|
Twice the Ice Charleston |
25 | 2 | 1 |
About this data
Water systems are matched to Coles County, nearest to Janesville 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.