Jefferson County, Missouri
12 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Crystal City Pws | 4,733 | Groundwater | 11 | 10 |
| Villa Antonio Winery | 800 | Groundwater | 11 | 2 |
| Hillsboro Pws | 3,000 | Groundwater | 8 | 1 |
| Pevely Pws | 5,600 | Groundwater | 13 | 0 |
| Jefferson County Pwsd 2 | 16,548 | Surface Water | 9 | 0 |
| Our Lady Queen of Peace | 240 | Groundwater | 4 | 0 |
| Herculaneum Pws | 4,227 | GUP | 3 | 0 |
| Friendship Baptist Church | 100 | Groundwater | 2 | 0 |
| Festus Pws | 12,054 | GUP | 1 | 0 |
| Desoto Pws | 6,400 | Groundwater | 0 | 0 |
| Jefferson Co Pwsd 8 | 4,733 | Groundwater | 0 | 0 |
| Jefferson County Water Authority | 25 | Groundwater Under Influence | 0 | 0 |