Coles County, Illinois
6 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Charleston | 17,286 | Surface Water | 9 | 1 |
| Ashmore | 637 | Groundwater | 37 | 0 |
| Oakland | 739 | Groundwater Purchased | 25 | 0 |
| Eastern Illinois University | 5,500 | Surface Water Purchased | 11 | 0 |
| Mattoon | 19,500 | Surface Water | 5 | 0 |
| Humboldt | 361 | Surface Water Purchased | 4 | 0 |