We found 24 public water systems in Washington county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| East Washington Rural Water | Salem | 8,458 | 0 | 24 |
| Salem Water Works | Salem | 6,719 | 15 | 91 |
| Posey Township Water Corp. | Hardinsburg | 3,402 | 0 | 13 |
| New Pekin Water Utility | Salem | 2,025 | 0 | 12 |
| Murdocks Dairy Bar | Campbellsburg | 999 | 0 | 0 |
| Campbellsburg Water Works | Campbellsburg | 900 | 0 | 10 |
| North Brown Water Corporation | Campbellsburg | 260 | 0 | 0 |
| Mount Tabor Christian Church | Salem | 200 | 0 | 0 |
| West Washington School | Williamsport | 150 | 0 | 0 |
| New Hope United Methodist | Williamsport | 125 | 0 | 0 |
| Livonia Missionary Baptist | Williamsport | 100 | 0 | 0 |
| Wonder Valley Christian Camp | Williamsport | 80 | 0 | 0 |
| L & O Restaurant (hardinsburg) | Williamsport | 75 | 0 | 0 |
| Redfox Tavern | Williamsport | 75 | 0 | 0 |
| Satterfield's Dairy Bar | Williamsport | 75 | 0 | 0 |
| Fredricksburg United Methodist | Williamsport | 75 | 0 | 0 |
| Little Twirl Dairy Bar | Williamsport | 50 | 0 | 0 |
| Livonia Presbyterian Church | Scottsburg | 40 | 0 | 0 |
| C & M Tavern | Scottsburg | 40 | 0 | 0 |
| Peek A Boo Lake (spring) | New Pekin | 40 | 0 | 0 |
| Livonia Volunteer Fire Dept. | Williamsport | 30 | 0 | 0 |
| Silver Lantern Tavern | Williamsport | 30 | 0 | 0 |
| National Water Bedding | Williamsport | 25 | 0 | 0 |
| Barker's Grocery | Scottsburg | 25 | 0 | 0 |