We found 8 public water systems in Washington county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Springfield Water Works | Springfield | 13,205 | 19 | 19 |
| St Catherine College/academy | St Catherine | 300 | 0 | 0 |
| Willisburg Elem School | Willisburg | 280 | 0 | 0 |
| Fredericktown Water Co Inc | Springfield | 250 | 0 | 0 |
| Mackville Elementary School | Mackville | 188 | 0 | 0 |
| Calvary Christian Assembly Cam | Mackville | 125 | 0 | 0 |
| Saint Rose Priory-head Start | Springfield | 52 | 0 | 0 |
| Camp Staggs | Willisburg | 24 | 0 | 0 |