We found 15 public water systems that could serve the same population as Wards 4 & 5 Water System (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Hebert Water System | County of Caldwell Parish | 3,048 | 0 | 8 |
| East Columbia Water System | County of Caldwell Parish | 2,640 | 0 | 32 |
| Columbia Heights Water District | County of Caldwell Parish | 1,965 | 0 | 1 |
| Grayson Water System | County of Caldwell Parish | 1,461 | 0 | 7 |
| Kelly Water District | County of Caldwell Parish | 1,140 | 0 | 6 |
| Holum Water System | County of Caldwell Parish | 1,080 | 0 | 20 |
| Clarks Water System | County of Caldwell Parish | 996 | 0 | 9 |
| Columbia Water System | County of Caldwell Parish | 912 | 0 | 6 |
| Cotton Plant Water System | County of Caldwell Parish | 705 | 0 | 13 |
| Caldwell Parish School Board | County of Caldwell Parish | 650 | 0 | 0 |
| Vixen Water System East | County of Caldwell Parish | 486 | 0 | 73 |
| Dayton Malleable Inc | County of Caldwell Parish | 125 | 0 | 0 |
| U S Corp Of Engineers | County of Caldwell Parish | 100 | 0 | 0 |
| Riverton Lock & Dam West | County of Caldwell Parish | 100 | 0 | 0 |
| U S Corp Of Engineers | County of Caldwell Parish | 100 | 0 | 0 |