Tennessee water quality by county
95 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Anderson County | 7 | 100,770 | 0 | 0 | |
| Bedford County | 5 | 67,663 | 0 | 0 | |
| Benton County | 10 | 12,423 | 0 | 0 | |
| Bledsoe County | 2 | 10,920 | 0 | 0 | |
| Blount County | 16 | 166,875 | 0 | 0 | |
| Bradley County | 3 | 116,194 | 0 | 0 | |
| Campbell County | 8 | 46,092 | 0 | 0 | |
| Cannon County | 1 | 11,840 | 0 | 0 | |
| Carroll County | 11 | 20,097 | 0 | 0 | |
| Carter County | 22 | 59,835 | 0 | 0 | |
| Cheatham County | 4 | 41,924 | 0 | 0 | |
| Chester County | 7 | 9,579 | 1 | 0 | |
| Claiborne County | 7 | 29,648 | 1 | 0 | |
| Clay County | 2 | 10,597 | 0 | 0 | |
| Cocke County | 8 | 37,426 | 0 | 1 | |
| Coffee County | 9 | 70,354 | 1 | 0 | |
| Crockett County | 6 | 17,355 | 0 | 0 | |
| Cumberland County | 7 | 75,082 | 0 | 1 | |
| Davidson County | 4 | 940,528 | 0 | 0 | |
| DeKalb County | 6 | 29,992 | 0 | 0 | |
| Decatur County | 8 | 14,453 | 0 | 0 | |
| Dickson County | 3 | 79,832 | 0 | 0 | |
| Dyer County | 6 | 37,128 | 0 | 0 | |
| Fayette County | 17 | 29,016 | 0 | 0 | |
| Fentress County | 3 | 24,480 | 0 | 0 | |
| Franklin County | 9 | 53,937 | 0 | 0 | |
| Gibson County | 15 | 42,531 | 0 | 0 | |
| Giles County | 6 | 36,410 | 0 | 0 | |
| Grainger County | 10 | 13,907 | 0 | 0 | |
| Greene County | 8 | 84,481 | 0 | 1 | |
| Grundy County | 5 | 19,781 | 1 | 0 | |
| Hamblen County | 5 | 85,076 | 0 | 0 | |
| Hamilton County | 11 | 409,965 | 0 | 0 | |
| Hancock County | 1 | 3,044 | 0 | 0 | |
| Hardeman County | 16 | 15,823 | 2 | 0 | |
| Hardin County | 6 | 30,906 | 0 | 0 | |
| Hawkins County | 12 | 48,804 | 0 | 1 | |
| Haywood County | 9 | 24,351 | 0 | 0 | |
| Henderson County | 4 | 32,235 | 0 | 0 | |
| Henry County | 19 | 27,019 | 1 | 0 | |
| Hickman County | 10 | 26,647 | 0 | 0 | |
| Houston County | 2 | 12,337 | 0 | 0 | |
| Humphreys County | 16 | 17,510 | 0 | 2 | |
| Jackson County | 5 | 11,177 | 1 | 0 | |
| Jefferson County | 22 | 61,294 | 0 | 0 | |
| Johnson County | 8 | 11,411 | 0 | 0 | |
| Knox County | 9 | 601,914 | 0 | 0 | |
| Lake County | 2 | 4,686 | 0 | 0 | |
| Lauderdale County | 6 | 27,400 | 0 | 0 | |
| Lawrence County | 13 | 47,717 | 0 | 0 | |
| Lewis County | 5 | 13,153 | 0 | 0 | |
| Lincoln County | 3 | 42,260 | 0 | 0 | |
| Loudon County | 4 | 66,366 | 0 | 0 | |
| Macon County | 2 | 29,050 | 0 | 0 | |
| Madison County | 20 | 99,102 | 0 | 0 | |
| Marion County | 10 | 28,312 | 0 | 0 | |
| Marshall County | 4 | 41,362 | 0 | 0 | |
| Maury County | 4 | 185,349 | 0 | 0 | |
| McMinn County | 12 | 54,601 | 0 | 1 | |
| McNairy County | 5 | 36,604 | 0 | 0 | |
| Meigs County | 2 | 6,501 | 0 | 0 | |
| Monroe County | 13 | 53,600 | 0 | 0 | |
| Montgomery County | 8 | 345,971 | 0 | 0 | |
| Moore County | 2 | 8,184 | 0 | 0 | |
| Morgan County | 1 | 12,074 | 0 | 0 | |
| Obion County | 11 | 31,724 | 2 | 0 | |
| Overton County | 4 | 33,007 | 0 | 0 | |
| Perry County | 2 | 14,320 | 0 | 0 | |
| Pickett County | 1 | 8,658 | 0 | 0 | |
| Polk County | 19 | 8,692 | 0 | 0 | |
| Putnam County | 9 | 103,071 | 0 | 0 | |
| Rhea County | 7 | 52,115 | 0 | 0 | |
| Roane County | 9 | 73,936 | 0 | 0 | |
| Robertson County | 4 | 61,783 | 0 | 0 | |
| Rutherford County | 5 | 442,036 | 0 | 0 | |
| Scott County | 4 | 25,167 | 0 | 0 | |
| Sequatchie County | 5 | 13,989 | 0 | 0 | |
| Sevier County | 51 | 87,478 | 1 | 0 | |
| Shelby County | 8 | 823,154 | 0 | 0 | |
| Smith County | 7 | 23,120 | 1 | 0 | |
| Stewart County | 15 | 13,153 | 0 | 0 | |
| Sullivan County | 17 | 196,794 | 0 | 1 | |
| Sumner County | 6 | 302,055 | 0 | 0 | |
| Tipton County | 9 | 70,511 | 0 | 0 | |
| Trousdale County | 1 | 10,562 | 0 | 0 | |
| Unicoi County | 4 | 17,136 | 0 | 0 | |
| Union County | 9 | 19,831 | 0 | 0 | |
| Van Buren County | 1 | 5,611 | 1 | 0 | |
| Warren County | 3 | 67,594 | 0 | 0 | |
| Washington County | 2 | 138,126 | 0 | 0 | |
| Wayne County | 12 | 13,476 | 1 | 1 | |
| Weakley County | 11 | 20,648 | 0 | 0 | |
| White County | 5 | 39,875 | 0 | 0 | |
| Williamson County | 7 | 252,925 | 0 | 0 | |
| Wilson County | 7 | 210,149 | 1 | 1 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Tennessee records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.