Illinois
Coles County drinking water quality
16 active public water systems serve 57,953 people in Coles County. 6 are compliant, 10 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mattoon Mattoon |
19,500 | 0 | 0 | |
|
Charleston Charleston |
17,286 | 5 | 2 | |
|
Clear Water Service Corp |
8,900 | 2 | 0 | |
|
Eastern Illinois University Charleston |
5,500 | 3 | 0 | |
|
Embarras Area Water District |
3,750 | 0 | 0 | |
|
Oakland Oakland |
739 | 3 | 0 | |
|
Cooks Mills Water Association |
720 | 1 | 1 | |
|
Ashmore Ashmore |
637 | 8 | 0 | |
|
Longacre Estates MHP |
375 | 0 | 0 | |
|
Humboldt Humboldt |
361 | 0 | 0 |
Non-community systems (6: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Walmart Mattoon |
50 | 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 | |
|
Walmart Supercenter #0612 |
25 | 0 | 0 |
Inactive systems (84, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.