Tennessee drinking water quality
Tennessee has 761 active public water systems serving 8 million people. 388 of them, 51%, had at least one EPA violation in the past three years, 271 have an unresolved violation today, and 15 are designated serious violators by the EPA.
Active systems
761
in 95 counties
People served
8M
445 community systems serve 7.9M
Violations, past 3 years
388
51% of active systems
Serious violators
15
10 systems carry a health flag
Largest counties
All 95 counties| County | People served | Systems | With violations |
|---|---|---|---|
| Davidson | 940,528 | 4 | 3 |
| Shelby | 823,154 | 8 | 2 |
| Knox | 601,914 | 9 | 4 |
| Rutherford | 442,036 | 5 | 2 |
| Hamilton | 409,965 | 11 | 5 |
| Montgomery | 345,971 | 8 | 2 |
| Sumner | 302,055 | 6 | 3 |
| Williamson | 252,925 | 7 | 3 |
| Wilson | 210,149 | 7 | 4 |
| Sullivan | 196,794 | 17 | 9 |
Largest community water systems
All 761 systems| System | Serves | Status |
|---|---|---|
| Metro Water Services Davidson County |
789,969 | |
| Memphis Light, Gas, & Water Shelby County |
659,500 | |
| Knoxville Utilities Board Kub Knox County |
254,671 | |
| Clarksville Water Department Montgomery County |
251,864 | |
| Consolidated U.d. of Rutherford CO Rutherford County |
221,871 | |
| Tennessee American Water Hamilton County |
207,046 | |
| White House Utility District Sumner County |
130,411 | |
| First U.d. of Knox County Knox County |
115,531 | |
| Murfreesboro Water Department Rutherford County |
114,331 | |
| Kingsport Water Dept Sullivan County |
107,739 |
About the Tennessee data
Retrieved from EPA ECHO on Oct 11, 2026. EPA records for Tennessee systems do not include town names, so searches here match on ZIP code, street address, or county.