We found 17 public water systems in Audrain county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Mo American Mexico | Mexico | 11,543 | 17 | 0 |
| Monroe Co Pwsd 2 | Paris | 6,677 | 0 | 5 |
| Vandalia | Vandalia | 2,529 | 0 | 29 |
| Audrain Co Pwsd 2 | Mexico | 2,260 | 0 | 0 |
| Audrain Co Pwsd 1 | Mexico | 1,455 | 0 | 0 |
| Nat'l Refractories & Minera | Mexico | 525 | 0 | 0 |
| Laddonia | Laddonia | 511 | 0 | 11 |
| Community R-6 School Distri | Laddonia | 460 | 0 | 0 |
| Farber | Farber | 450 | 0 | 7 |
| Martinsburg | Martinsburg | 304 | 0 | 3 |
| Nancys Place | County of Audrain | 254 | 0 | 0 |
| Rush Hill | Rush Hill | 115 | 0 | 0 |
| Mexico Ymca | Mexico Ymca | 100 | 0 | 0 |
| Findley Refractories | Findley Refract | 70 | 0 | 0 |
| Mc Gee Packing Company | Mexico | 45 | 0 | 0 |
| Service & Supply Coop | Vandalia | 25 | 0 | 0 |
| Borden's Motel & Camper Court | Bordens Motel | 25 | 0 | 0 |