We found 23 public water systems in Grant county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Elgin City Of | Elgin | 642 | 0 | 5 |
| Carson City Of | Carson | 293 | 0 | 4 |
| New Leipzig City Of | New Leipzig | 221 | 0 | 1 |
| St Gertrudes Parish | County of Grant | 100 | 0 | 0 |
| Prairie Learning Center | County of Grant | 100 | 0 | 0 |
| Heart Butte F U Camp | County of Grant | 65 | 0 | 0 |
| Leahy Elementary School | County of Grant | 41 | 0 | 0 |
| Wollman Ranch | County of Grant | 33 | 0 | 0 |
| Downstream Rec Area | County of Grant | 30 | 0 | 0 |
| Shields Bar | Shields | 25 | 0 | 0 |
| North Side Trailer Area #2 | County of Grant | 25 | 0 | 0 |
| North Side Trailer Area #1 | County of Grant | 25 | 0 | 0 |
| Lake Tschida Downstream Campground | County of Grant | 25 | 0 | 0 |
| Raleigh Bar | County of Grant | 25 | 0 | 0 |
| Family Food Center | County of Grant | 25 | 0 | 0 |
| Lynn's Super Valu | County of Grant | 25 | 0 | 0 |
| Cannonball Stage Station S H Site | County of Grant | 25 | 0 | 0 |
| Rimrock Rec Area | County of Grant | 8 | 0 | 0 |
| Rimrock Rec At Highway 49 | County of Grant | 6 | 0 | 0 |
| Schatzs Point | County of Grant | 5 | 0 | 0 |
| Crappie Creek North | County of Grant | 2 | 0 | 0 |
| North Shore Concessions | County of Grant | 1 | 0 | 0 |
| Crappie Creek Rec Area | County of Grant | 0 | 0 | 0 |