We found 5 public water systems in Ralls county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Ralls Co Pwsd 1 | County of Ralls | 6,755 | 0 | 4 |
| Cannon Pwsd 1 | Perry | 6,482 | 0 | 0 |
| New London | New London | 975 | 0 | 1 |
| Perry | Perry | 694 | 0 | 0 |
| Salt River Trailer Park | County of Ralls | 48 | 0 | 0 |