We found 27 public water systems in Jefferson county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Louisville Water Company | County of Jefferson | 764,769 | 68 | 81 |
| Louisville Water Co/payne | Louisville | 127,455 | 0 | 0 |
| Jeffersontown Mun Water Works | Jeffersontown | 12,820 | 0 | 0 |
| Pure Ice Company | Louisville | 2,000 | 0 | 0 |
| Kentucky Bubbling Spring Inc | Louisville | 1,000 | 0 | 0 |
| River Creek Inn | Harrods Creek | 800 | 0 | 0 |
| Captain's Quarters | Harrods Creek | 700 | 0 | 0 |
| E I Du Pont De Nemours & Co | Louisville | 400 | 0 | 0 |
| American Synthetic Rubber | Louisville | 200 | 0 | 0 |
| Schenley Dist/town Creek | Louisville | 100 | 0 | 0 |
| Armored Acres Mhp | West Point | 99 | 0 | 0 |
| Limestone Bay Club | Harrods Creek | 75 | 0 | 0 |
| Wallace Farm | County of Jefferson | 68 | 0 | 0 |
| Old Ky Home Boy Scout Council | Louisville | 50 | 0 | 0 |
| Schenley Dist/long Lick Creek | Louisville | 50 | 0 | 0 |
| Florida Steel Corp | Louisville | 40 | 0 | 0 |
| Ed Hale's Place | West Point | 25 | 0 | 0 |
| Louisville Gas/elec (spring) | Louisville | 25 | 0 | 0 |
| Louisville Gas/elec(otter Crk) | Louisville | 25 | 0 | 0 |
| Riverview Inn | Louisville | 15 | 0 | 0 |
| Hosbrau Haus | West Point | 15 | 0 | 0 |
| 24-karat | Louisville | 13 | 0 | 0 |
| Bennie's First/last Chance | West Point | 10 | 0 | 0 |
| Tyler Mountain Water Company | Louisville | 0 | 0 | 0 |
| Cedar Ridge Presbyterian Camp | County of Jefferson | 0 | 0 | 0 |
| Tyler Mountain Spring Water Co | Louisville | 0 | 0 | 0 |
| Ashley Point Mobile Home Park | County of Jefferson | 0 | 0 | 0 |