We found 23 public water systems that could serve the same population as Lower Granite Lock & Dam (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Garfield County Fairgrounds | County of Garfield | 1,500 | 0 | 5 |
| Pomeroy, City Of | County of Garfield | 1,425 | 0 | 39 |
| Alpowa Summit Rest Area | County of Garfield | 801 | 0 | 7 |
| Usace Illia Residential Area | County of Garfield | 46 | 0 | 0 |
| Hiway Trailer Court | County of Garfield | 36 | 0 | 0 |
| Dye Seed Ranch 1 | County of Garfield | 30 | 0 | 0 |
| Clearwater Guard Station | County of Garfield | 30 | 0 | 0 |
| Ramers Pataha Cafe | County of Garfield | 28 | 0 | 0 |
| Wickiup Campground | County of Garfield | 25 | 0 | 0 |
| Teal Spring Campground | County of Garfield | 25 | 0 | 0 |
| Spruce Springs Campground | County of Garfield | 25 | 0 | 0 |
| Big Spring Campground | County of Garfield | 25 | 0 | 0 |
| Lower Granite Sub Station | County of Garfield | 25 | 0 | 0 |
| Big Spring Campground | County of Garfield | 25 | 0 | 0 |
| Atkinson-wisner & Becker | County of Garfield | 25 | 0 | 0 |
| Teal Spring Campground | County of Garfield | 25 | 0 | 0 |
| Spruce Springs Campground | County of Garfield | 25 | 0 | 0 |
| Van Vogt Water System | County of Garfield | 25 | 0 | 0 |
| Rose Springs #2 | County of Garfield | 18 | 0 | 0 |
| Central Ferry Store & Rv Park | County of Garfield | 17 | 0 | 0 |
| Bakers Pond Water Users Corp | County of Garfield | 12 | 0 | 0 |
| Dodge Junction Cafe | County of Garfield | 6 | 0 | 0 |
| Rose Springs #2 | County of Garfield | 1 | 0 | 0 |