We found 26 public water systems that could serve the same population as St. John Lutheran Church (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Sirwa #2 (creston) | Creston | 18,510 | 35 | 9 |
| Greenfield Municipal Utilities | Greenfield | 1,982 | 0 | 6 |
| Sirwa #1 (greenfield) | Greenfield | 1,840 | 0 | 12 |
| Stuart Water Supply | Stuart | 1,648 | 0 | 19 |
| Dot-4 (i-80 Ra 001s Adair) | County of Adair | 808 | 0 | 0 |
| Adair Municipal Water Supply | Adair | 781 | 0 | 39 |
| Fontanelle Water Works | Fontanelle | 742 | 0 | 1 |
| Dot-4 (i-80 Ra 002n Adair) | County of Adair | 631 | 0 | 0 |
| Orient Municipal Water Supply | Orient | 408 | 0 | 13 |
| Adair-casey Community School | Adair | 400 | 0 | 9 |
| Orient Sale Company | County of Adair | 200 | 0 | 0 |
| Bridgewater Municipal Water Works | County of Adair | 178 | 0 | 0 |
| Orient Macksburg School District | County of Adair | 115 | 0 | 0 |
| Stanzel Christian High School | County of Adair | 75 | 0 | 0 |
| Mormon Lake Trail-adair Consrv | County of Adair | 52 | 0 | 0 |
| Camp Es-wa-ta Inc. | County of Adair | 35 | 0 | 0 |
| Hill Of Zion Church | County of Adair | 35 | 0 | 0 |
| Lake Orient County Park | County of Adair | 30 | 0 | 0 |
| Greenfield Country Club | County of Adair | 28 | 0 | 0 |
| New Bethel Church | County of Adair | 25 | 0 | 0 |
| Dew Drop Inn | County of Adair | 25 | 0 | 0 |
| Avondale United Methodist Chur | County of Adair | 25 | 0 | 0 |
| Penn Avenue Methodist Church | County of Adair | 25 | 0 | 0 |
| Ken Sidey Nat Area-adair Consv | County of Adair | 25 | 0 | 0 |
| Hebron United Methodist Church | County of Adair | 25 | 0 | 0 |
| Zion-brown Treatment Center | County of Adair | 25 | 0 | 0 |