Safest Drinking Water in Kentucky 2026
Kentucky has 5 public water systems serving 1,431,174 people. The safest system is Louisville Water Company in Louisville with a score of 100/100.
Top 5 Water Systems in Kentucky
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | Louisville Water Company | Louisville | 764,769 | Surface water | 0 | A (100) |
| 2 | Kentucky-American Water Co | Lexington | 299,501 | Surface water | 0 | A (94) |
| 3 | Northern Kentucky Water District | Ft. Thomas | 199,460 | Surface water | 0 | B (88) |
| 4 | Warren County Water District | Bowling Green | 91,118 | Surface water | 0 | B (86) |
| 5 | Hardin County Water District #2 | Elizabethtown | 76,326 | Surface water | 0 | C (79) |
Water quality data for Kentucky is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
Louisville Water Company in Louisville has the highest Water Safety Score in Kentucky at 100/100 (Grade A), serving 764,769 people.
Kentucky has 5 public water systems serving 1,431,174 people. The average Water Safety Score is 89/100.
The Water Safety Score (0-100) is based on health violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Higher scores mean cleaner, safer water.
Water Safety Score: health violations (40%), contaminant exceedances (30%), enforcement history (20%), monitoring violations (10%).