We found 11 public water systems in Chautauqua county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Sedan, City Of | Sedan | 1,034 | 0 | 38 |
| Cedar Vale, City Of | Cedar Vale | 527 | 0 | 22 |
| Chautauqua Co Rwd 4 | Sedan | 415 | 0 | 2 |
| Chautauqua Co Rwd 2 | Cedar Vale | 278 | 0 | 11 |
| Chautauqua Co Rwd 3 | Sedan | 200 | 0 | 27 |
| Chautauqua Co Rwd 1 | Sedan | 135 | 0 | 4 |
| Peru, City Of | Peru | 129 | 0 | 22 |
| Chautauqua, City Of | Chautauqua | 103 | 0 | 0 |
| Elgin, City Of | Elgin | 82 | 0 | 0 |
| Public Wholesale Wsd 20 | Sedan | 1 | 0 | 0 |
| Quivira Scout Ranch | Sedan | 0 | 0 | 0 |