We found 20 public water systems in Todd county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Tripp County Water User District | Hamill, Winner | 4,765 | 0 | 57 |
| Rosebud Utilities Commission | Rosebud | 1,745 | 0 | 0 |
| Saint Francis | County of Todd | 1,000 | 0 | 0 |
| St Francis Water Authority | St Francis | 935 | 0 | 0 |
| Mission | County of Todd | 904 | 0 | 0 |
| Rosebud Utilities Commision | Parmelee | 407 | 0 | 0 |
| Rosebud Utilities Commission | Spring Creek | 215 | 0 | 0 |
| He Dog School | County of Todd | 202 | 0 | 0 |
| Rosebud Utilities Commission | Okreek | 193 | 0 | 0 |
| Rosebud Utilities Commission | Soldier Creek | 154 | 0 | 0 |
| Rosebud Utilities Commission | Blackpipe | 132 | 0 | 0 |
| Spring Creek School | County of Todd | 107 | 0 | 0 |
| Rosebud Utilities Commission | Swift Bear | 105 | 0 | 0 |
| Rosebud Utilities Commission | Ideal | 94 | 0 | 0 |
| Lakeview Elementary School | Mission | 75 | 0 | 0 |
| Rosebud Utilities Commission | Wood | 61 | 0 | 0 |
| Littleburg Elementary School | Mission | 48 | 0 | 0 |
| Rosebud Utilities Commission | Milks Camp | 44 | 0 | 0 |
| Klein School | Mission | 25 | 0 | 0 |
| Rosebud Utilities Commission | Dixon | 22 | 0 | 0 |