We found 13 public water systems in Lamar county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Barnesville | Barnesville | 6,755 | 0 | 10 |
| Lamar County | County of Lamar | 2,168 | 0 | 0 |
| Milner | Milner | 954 | 0 | 13 |
| Pee Wee's Bar-b-q | County of Lamar | 187 | 0 | 0 |
| The Country Kitchen | County of Lamar | 143 | 0 | 0 |
| Fullers Community Park | Barnesville | 125 | 0 | 27 |
| The Catfish Hole | County of Lamar | 80 | 0 | 0 |
| Highfalls Campground | Barnesville | 78 | 0 | 0 |
| The Lighthouse Restaurant | County of Lamar | 50 | 0 | 0 |
| Johnson's Mobile Home Park | County of Lamar | 33 | 0 | 0 |
| Liz Acres Subdivision | County of Lamar | 30 | 0 | 0 |
| Country Court Motel | County of Lamar | 25 | 0 | 0 |
| Williamson Geor | 25 | 0 | 0 |