We found 32 public water systems that could serve the same population as Calvin (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Holdenville | Holdenville | 4,732 | 0 | 71 |
| Davis Correctional Facility | County of Hughes | 1,910 | 0 | 34 |
| Wetumka | County of Hughes | 1,451 | 0 | 127 |
| Hughes Co. Rwd #6 (gerty) | County of Hughes | 1,380 | 0 | 6 |
| Hughes Co. Rwd #1 | County of Hughes | 1,170 | 0 | 25 |
| Hughes Co. Rwd #2 | County of Hughes | 1,145 | 0 | 195 |
| Hughes Co Rwd #2 | County of Hughes | 1,083 | 0 | 0 |
| Hughes Co. Rwd #5 | County of Hughes | 800 | 0 | 50 |
| Hughes Co. Rwd #4 | County of Hughes | 800 | 0 | 3 |
| Dustin Pws | County of Hughes | 496 | 0 | 131 |
| Moss School | County of Hughes | 297 | 0 | 19 |
| Hughes Co. Rwd #3 | County of Hughes | 200 | 0 | 22 |
| Bsa Camp Sasakwa | County of Hughes | 150 | 0 | 0 |
| Gerty Cong Meals | County of Hughes | 55 | 0 | 0 |
| Toots Place | County of Hughes | 50 | 0 | 0 |
| Midway Grocery | County of Hughes | 25 | 0 | 0 |
| Moory Grocery | County of Hughes | 25 | 0 | 0 |
| B.j.'s Grocery | County of Hughes | 25 | 0 | 0 |
| Nells Grocery | County of Hughes | 25 | 0 | 0 |
| Candys Drive-inn | County of Hughes | 25 | 0 | 0 |
| Jennys Cafe | County of Hughes | 25 | 0 | 0 |
| Steeles Grocery | County of Hughes | 25 | 0 | 0 |
| Sipes Grocery | County of Hughes | 25 | 0 | 0 |
| Corner Grocery | County of Hughes | 25 | 0 | 0 |
| Tonys Fruit Stand | County of Hughes | 25 | 0 | 0 |
| Arthurs Quick Stop | County of Hughes | 25 | 0 | 0 |
| Wellington Grocery | County of Hughes | 25 | 0 | 0 |
| Y TAVERN | County of Hughes | 25 | 0 | 0 |
| Toots Place | County of Hughes | 25 | 0 | 0 |
| Atwood Country Store | County of Hughes | 25 | 0 | 0 |
| Hickory Hills | County of Hughes | 25 | 0 | 0 |
| Gerty Grocery | County of Hughes | 10 | 0 | 0 |