County · Illinois
Coles County, Illinois: drinking water records
This overview covers 6 ZIP codes and 9 community water systems in Coles County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Charleston IL0290100 | 17,286 | 120 | 1 | 1 | 3 ppb |
| Mattoon IL0290250 | 19,500 | 120 | 1 | 0 | 3.6 ppb |
| Clear Water Service Corp IL0295100 | 8,900 | 120 | 0 | 0 | 1.1 ppb |
| Eastern Illinois University IL0295500 | 5,500 | 120 | 0 | 0 | 0 ppb |
| Embarras Area Water District IL0290020 | 3,750 | 60 | 0 | 0 | 1.4 ppb |
| Oakland IL0290300 | 739 | 0 | 0 | 0 | 0 ppb |
| Cooks Mills Water Association IL0295200 | 720 | 0 | 0 | 0 | 0 ppb |
| Ashmore IL0290050 | 637 | 0 | 0 | 0 | 0 ppb |
| Humboldt IL0290150 | 361 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Coles County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.