We found 11 public water systems in Douglas county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Bon Homme-yankton Rws | Avon, Tabor | 11,862 | 40 | 5 |
| Davison Rural Water System Inc | Mitchell | 3,050 | 0 | 1 |
| Aurora-brule Rural Water System | Kimball | 2,600 | 0 | 42 |
| Armour | Armour | 702 | 0 | 4 |
| Corsica | Corsica | 592 | 0 | 15 |
| Delmont | Delmont | 120 | 0 | 0 |
| Hartmann Valley Station | County of Douglas | 100 | 0 | 0 |
| Clearfield Colony | Aberdeen, Delmont | 96 | 0 | 0 |
| Greenwood Colony | Aberdeen, Delmont | 85 | 0 | 0 |
| Cowboy Cafe | County of Douglas | 50 | 0 | 0 |
| Dot Rest Area 304b-geddes | Geddes | 25 | 0 | 0 |