We found 15 public water systems that could serve the same population as Defiance County Airport (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Defiance City | Defiance | 16,494 | 22 | 48 |
| Poplar Ridge Church Brethren | Defiance | 800 | 0 | 0 |
| Tinora Jr High/ High School | Defiance | 778 | 0 | 0 |
| Apostolic Christian Church | Defiance | 200 | 0 | 0 |
| St Marks Lutheran Church-defiance | Defiance | 150 | 0 | 0 |
| Defiance Co Fish & Game Assn | Defiance | 100 | 0 | 0 |
| St Stephens Lutheran Church-defiance | Defiance | 100 | 0 | 0 |
| St Michael Alc | Defiance | 85 | 0 | 0 |
| Country Meadows Mobile Home Park Pws | Defiance | 80 | 0 | 0 |
| Tiffin Elementary School | Defiance | 76 | 0 | 0 |
| Tri-state Yokefellow House | Defiance | 50 | 0 | 0 |
| Odnr Independence Dam Camping | Defiance | 47 | 0 | 0 |
| Defiance County Garage | Defiance | 30 | 0 | 0 |
| Cml | Defiance | 30 | 0 | 0 |
| Hohenbergers Trailer Pk. | Defiance | 25 | 0 | 0 |