We found 38 public water systems that could serve the same population as Nps John Day Nm/sheep Rock (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| John Day, City Of | County of Grant | 1,920 | 0 | 10 |
| Prairie City | County of Grant | 910 | 0 | 34 |
| Canyon City Water Department | County of Grant | 676 | 0 | 16 |
| Mount Vernon, City Of | County of Grant | 600 | 0 | 91 |
| Odot Hd Vance Creek Rest Area | County of Grant | 200 | 0 | 0 |
| Long Creek, City Of | County of Grant | 195 | 0 | 93 |
| Dayville, City Of | County of Grant | 175 | 0 | 65 |
| Seneca, City Of | County of Grant | 175 | 0 | 31 |
| Monument, City Of | County of Grant | 130 | 0 | 101 |
| Wilderness Theater-grant.co. | County of Grant | 100 | 0 | 0 |
| Snaffle Bit Dinner House | County of Grant | 90 | 0 | 0 |
| Lake Creek Youth Rec Camp | County of Grant | 75 | 0 | 0 |
| Mountain View Country Club | County of Grant | 75 | 0 | 0 |
| Usfs Dale Work Ctr/john Day Rs | County of Grant | 60 | 0 | 0 |
| Usfs Frazier Campground | County of Grant | 56 | 0 | 0 |
| Oprd Carter Safety Rest Area | County of Grant | 50 | 0 | 0 |
| Oprd Clyde Holliday Wayside | County of Grant | 50 | 0 | 0 |
| John Day Valley Pack | County of Grant | 28 | 0 | 0 |
| Usfs Magone Lake Cg | County of Grant | 26 | 0 | 0 |
| Usfs Parrish Cabin | County of Grant | 25 | 0 | 0 |
| Dale Grocery | County of Grant | 25 | 0 | 0 |
| Nps John Day Nm/foree | County of Grant | 25 | 0 | 0 |
| Austin House | County of Grant | 25 | 0 | 0 |
| Usfs Olive Lake Campground | County of Grant | 25 | 0 | 0 |
| Usfs Wickiup Campground (inactive) | County of Grant | 25 | 0 | 0 |
| Usfs Rock Springs Campground | County of Grant | 25 | 0 | 0 |
| XUSFS BIG CREEK CAMPGROUND | County of Grant | 25 | 0 | 0 |
| XUSFS TROUT FARM CAMPGROUND | County of Grant | 25 | 0 | 0 |
| XUSFS DIXIE CAMPGROUND | County of Grant | 25 | 0 | 0 |
| Usfs Strawberry Campground | County of Grant | 20 | 0 | 0 |
| Usfs Canyon Meadows | County of Grant | 20 | 0 | 0 |
| Ponderosa Ranch | County of Grant | 20 | 0 | 0 |
| Granite Water System | County of Grant | 17 | 0 | 0 |
| Ritter Hot Springs | County of Grant | 15 | 0 | 0 |
| Usfs Parish Cabin Cg | County of Grant | 15 | 0 | 0 |
| Usfs Bull Prairie Sprg Cg | County of Grant | 11 | 0 | 0 |
| Oprd Bates State Park | County of Grant | 10 | 0 | 0 |
| Usfs Blue Mtn Work Ctr | County of Grant | 4 | 0 | 0 |