Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Lawrence County | 1 | 4 |
| Limestone County | 1 | 5 |
| Lowndes County | 1 | 1 |
| Madison County | 31 | 132 |
| Marengo County | 1 | 1 |
| Marshall County | 4 | 10 |
| Montgomery County | 5 | 23 |
| Morgan County | 7 | 16 |
| Pickens County | 2 | 11 |
| Pike County | 1 | 1 |
| Randolph County | 2 | 3 |
| Russell County | 4 | 16 |
| Shelby County | 2 | 2 |
| Talladega County | 2 | 7 |
| Tuscaloosa County | 11 | 138 |
| Wilcox County | 2 | 2 |