Safest Drinking Water in Tennessee 2026
Tennessee has 5 public water systems serving 2,155,687 people. The safest system is Memphis Light, Gas, & Water in Memphis with a score of 100/100.
Top 5 Water Systems in Tennessee
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | Memphis Light, Gas, & Water | Memphis | 659,500 | Ground water | 0 | A (100) |
| 2 | Clarksville Water Department | Clarksville | 251,864 | Surface water | 0 | A (100) |
| 3 | Tennessee American Water | Chattanooga | 211,499 | Surface water | 0 | A (100) |
| 4 | Knoxville Utilities Board - Kub | Knoxville | 254,671 | Surface water | 0 | B (88) |
| 5 | Metro Water Services | Nashville | 778,153 | Surface water | 0 | B (82) |
Water quality data for Tennessee is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
Memphis Light, Gas, & Water in Memphis has the highest Water Safety Score in Tennessee at 100/100 (Grade A), serving 659,500 people.
Tennessee has 5 public water systems serving 2,155,687 people. The average Water Safety Score is 94/100.
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%).