We found 12 public water systems in Clay county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Lineville Water Works Board | Lineville | 3,126 | 2 | 1 |
| Ashland Water & Sewer Board | Ashland | 2,925 | 0 | 17 |
| Clay County Water Authority | Lineville | 1,719 | 0 | 14 |
| Millerville Water & Fire Pro Authority | Millerville | 1,500 | 0 | 17 |
| Hollins Water Authority | Hollins | 1,302 | 0 | 15 |
| Mellow Valley High %clay Co Bd Ed | County of Clay | 400 | 0 | 0 |
| Reds Catfish Cabin, Inc. | Daviston | 300 | 0 | 0 |
| Barfield School % Clay C.b.ed. | County of Clay | 175 | 0 | 0 |
| Horns 77 Pit Bar-b-que | Centreville | 40 | 0 | 0 |
| Lake Chinnabee Recreation Area Usda-fs | County of Clay | 32 | 0 | 0 |
| Clay Co Learning Center | County of Clay | 32 | 0 | 0 |
| Shinbone Valley Inn | County of Clay | 25 | 0 | 0 |