We found 14 public water systems that could serve the same population as Willis, City Of (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Hiawatha, City Of | Hiawatha | 3,065 | 0 | 48 |
| Horton, City Of | Horton | 1,702 | 0 | 8 |
| Brown Co Rwd 2 | Powhattan | 724 | 0 | 15 |
| Brown Co Rwd 1 | Fairview | 709 | 0 | 13 |
| Kickapoo Tribe In Kansas | Horton | 478 | 0 | 0 |
| Everest, City Of | Everest | 278 | 0 | 23 |
| Robinson, City Of | Robinson | 229 | 0 | 49 |
| Morrill, City Of | Morrill | 225 | 0 | 16 |
| Mulberry Creek | Morrill | 100 | 0 | 0 |
| Iowa Tribe Of Ke & Ne | White Cloud | 95 | 0 | 0 |
| Reserve, City Of | Reserve | 82 | 0 | 0 |
| Powhattan, City Of | Powhattan | 75 | 0 | 0 |
| Sycamore Springs Resort, Inc | Sabetha | 25 | 0 | 0 |
| Br Co Wi | Hiawatha | 25 | 0 | 0 |