We found 23 public water systems in Richland county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Rayville Water System | County of Richland Parish | 4,842 | 0 | 44 |
| Delhi Water Supply | County of Richland Parish | 4,071 | 0 | 5 |
| Archibald Water System | County of Richland Parish | 3,600 | 0 | 15 |
| River Road Water System | County of Richland Parish | 2,967 | 0 | 40 |
| Start Water System | County of Richland Parish | 2,514 | 0 | 6 |
| East Richland Ww District | County of Richland Parish | 1,950 | 0 | 17 |
| Bee Bayou Truck Stop | County of Richland Parish | 1,400 | 0 | 0 |
| Delhi Rest Area W. Sys. | County of Richland Parish | 1,200 | 0 | 0 |
| Mangham Water System | County of Richland Parish | 768 | 0 | 6 |
| Holley Ridge High School | County of Richland Parish | 350 | 0 | 0 |
| Warden Water System | County of Richland Parish | 240 | 0 | 8 |
| Mangham Junior High School | County of Richland Parish | 200 | 0 | 0 |
| Richland Parish Special High | County of Richland Parish | 160 | 0 | 0 |
| Bcc Detention Center Ws | County of Richland Parish | 150 | 0 | 11 |
| Holly Ridge W S | County of Richland Parish | 150 | 0 | 0 |
| Green Acres Tp W. System | County of Richland Parish | 90 | 0 | 0 |
| English Village Apts Ws | County of Richland Parish | 72 | 0 | 0 |
| Holley Ridge Special Education | County of Richland Parish | 70 | 0 | 0 |
| Palmetto Addiction Recovery | County of Richland Parish | 45 | 0 | 0 |
| Gallion Utilities | County of Richland Parish | 40 | 0 | 0 |
| Richland Heights Subd Water System | County of Richland Parish | 30 | 0 | 0 |
| Michigan Wisconsin Pipeline Co | County of Richland Parish | 18 | 0 | 0 |
| Mid Valley Pipeline Co | County of Richland Parish | 10 | 0 | 0 |