We found 16 public water systems that could serve the same population as St Mary (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Ste Genevieve | Ste. Genevieve | 4,400 | 0 | 4 |
| Ste Genevieve Co Pwsd 1 Sc | Ste. Genevieve | 3,503 | 0 | 6 |
| Ste Genevieve Co Pwsd 1 North | Ste. Genevieve | 1,263 | 0 | 6 |
| Lake Forest Estates | Ste. Genevieve | 850 | 0 | 14 |
| Bloomsdale | Bloomsdale | 521 | 0 | 25 |
| Grayhawk Water | Rocky Ridge | 450 | 0 | 2 |
| Holcim Us Inc Lee Island Project | County of Ste. Genevieve | 250 | 0 | 0 |
| Hawn State Park | Ste. Genevieve | 200 | 0 | 3 |
| Lake Seven Falls Association Inc | County of Ste. Genevieve | 188 | 0 | 40 |
| Crown Valley Micro Brewery | County of Ste. Genevieve | 115 | 0 | 0 |
| Crown Valley Winery | County of Ste. Genevieve | 100 | 0 | 0 |
| Chaumette Vineyard & Winery | County of Ste. Genevieve | 100 | 0 | 0 |
| Cave Vineyard | Ste. Genevieve | 90 | 0 | 0 |
| Peaceful Valley Baptist Camp | County of Ste. Genevieve | 65 | 0 | 0 |
| Crown Ridge Restaurant | County of Ste. Genevieve | 25 | 0 | 0 |
| Camp Butterfly | County of Ste. Genevieve | 25 | 0 | 0 |