Monroe County, Illinois
6 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Maeystown | 340 | Groundwater Purchased | 47 | 43 |
| Hecker | 429 | Surface Water Purchased | 16 | 1 |
| Fountain Water District | 3,650 | Groundwater | 5 | 1 |
| Waterloo | 10,190 | Groundwater | 69 | 0 |
| Valmeyer | 1,263 | Groundwater Purchased | 10 | 0 |
| Columbia | 11,129 | Surface Water Purchased | 6 | 0 |