Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Kemper County | 4 | 32 |
| Lafayette County | 6 | 15 |
| Lawrence County | 2 | 6 |
| Lee County | 2 | 6 |
| Leflore County | 5 | 11 |
| Lincoln County | 1 | 5 |
| Lowndes County | 8 | 29 |
| Madison County | 1 | 1 |
| Monroe County | 4 | 20 |
| Newton County | 1 | 1 |
| Oktibbeha County | 17 | 65 |
| Panola County | 3 | 9 |
| Pearl River County | 1 | 6 |
| Perry County | 1 | 1 |
| Pontotoc County | 1 | 10 |
| Prentiss County | 2 | 5 |
| Quitman County | 2 | 4 |
| Sharkey County | 5 | 14 |
| Sunflower County | 2 | 5 |
| Tallahatchie County | 1 | 4 |
| Tippah County | 1 | 2 |
| Tishomingo County | 3 | 24 |
| Tunica County | 7 | 30 |
| Union County | 1 | 2 |
| Warren County | 1 | 1 |