We found 8 public water systems in Jefferson Parish county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| E Jefferson Ww District 1 | New Orleans | 243,782 | 36 | 1 |
| W Jefferson Ww District 2 | New Orleans | 188,770 | 37 | 3 |
| Gretna Waterworks | Gretna | 17,802 | 38 | 21 |
| Westwego Waterworks | County of Jefferson Parish | 8,534 | 0 | 46 |
| Grand Isle Water System | County of Jefferson Parish | 2,450 | 0 | 0 |
| Robinson Canning Co Inc | County of Jefferson Parish | 15 | 0 | 0 |
| Southern Shellfish Co | County of Jefferson Parish | 15 | 0 | 0 |
| Cutcher Canning Co | County of Jefferson Parish | 15 | 0 | 0 |