We found 21 public water systems that could serve the same population as Ledges System 1 (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| President Calvin Coolidge Historic Site | Plymouth | 400 | 0 | 3 |
| Camp Plymouth State Park | Plymouth | 357 | 0 | 0 |
| Echo Lake Inn | Plymouth | 260 | 0 | 6 |
| Calvin Coolidge State Park | Plymouth | 254 | 0 | 0 |
| Round Top | Plymouth | 240 | 0 | 22 |
| Indian Brook | Plymouth | 200 | 0 | 2 |
| Timberlake | Plymouth | 200 | 0 | 1 |
| Calvin Coolidge Visitors Center | Plymouth | 200 | 0 | 0 |
| Barn Day Camp | Plymouth | 136 | 0 | 1 |
| Tamarack Farm | Plymouth | 128 | 0 | 3 |
| Bethany Birches Campground | Plymouth | 100 | 0 | 0 |
| Salt Ash Inn | Plymouth | 96 | 0 | 0 |
| Birch Landing Condominium | Plymouth | 82 | 0 | 0 |
| Plymouth Notch | Plymouth | 82 | 0 | 0 |
| President Coolidge Homestead | Plymouth | 60 | 0 | 0 |
| Cheese Factory Calvin Coolidge | Plymouth | 60 | 0 | 0 |
| Hawk Inn Mountain Resort | Plymouth | 47 | 0 | 0 |
| Killington Snowmobile Tours | Plymouth | 38 | 0 | 0 |
| Farm Brook Motel | Plymouth | 36 | 0 | 0 |
| Plymouth Camp | Plymouth | 20 | 0 | 0 |
| Plymouth School | Plymouth | 16 | 0 | 0 |