Locations
| Name | Sites | Samples |
|---|---|---|
| Lowndes County | 1 | 1 |
| Lowndes County | 8 | 29 |
| Lumpkin County | 2 | 1 |
| Luxembourg | 26 | 55 |
| Lyon County | 1 | 10 |
| Lyon County | 1 | 2 |
| Macon County | 2 | 7 |
| Macon County | 3 | 19 |
| Madison County | 31 | 132 |
| Madison County | 4 | 10 |
| Madison County | 1 | 1 |
| Madison County | 1 | 2 |
| Madison County | 1 | 1 |
| Madison County | 2 | 41 |
| Madison County | 4 | 5 |
| Madison Parish | 8 | 33 |
| Magoffin County | 1 | 2 |
| Mahaska County | 1 | 4 |
| Malawi | 2 | 14 |
| Manatee County | 5 | 50 |
| Marathon County | 1 | 2 |
| Marengo County | 1 | 1 |
| Marion County | 2 | 10 |
| Marion County | 7 | 38 |
| Marion County | 3 | 6 |
| Marion County | 1 | 1 |
| Marion County | 2 | 4 |
| Marion County | 3 | 45 |
| Marquette County | 5 | 8 |
| Marshall County | 1 | 1 |