Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Scott County | 1 | 1 |
| Sevier County | 4 | 22 |
| Shelby County | 5 | 56 |
| Smith County | 3 | 13 |
| Stewart County | 4 | 11 |
| Sullivan County | 3 | 13 |
| Sumner County | 3 | 55 |
| Tipton County | 3 | 5 |
| Trousdale County | 2 | 10 |
| Van Buren County | 2 | 14 |
| Warren County | 2 | 7 |
| Washington County | 2 | 6 |
| Weakley County | 1 | 2 |
| Williamson County | 9 | 46 |
| Wilson County | 1 | 10 |