Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Alamance County | 5 | 7 |
| Alleghany County | 1 | 1 |
| Anson County | 1 | 16 |
| Beaufort County | 2 | 2 |
| Bertie County | 2 | 4 |
| Bladen County | 1 | 4 |
| Brunswick County | 1 | 1 |
| Buncombe County | 9 | 29 |
| Burke County | 1 | 2 |
| Carteret County | 4 | 19 |
| Chatham County | 5 | 14 |
| Cherokee County | 2 | 4 |
| Chowan County | 2 | 2 |
| Clay County | 1 | 1 |
| Columbus County | 1 | 5 |
| Cumberland County | 3 | 6 |
| Currituck County | 3 | 10 |
| Dare County | 8 | 21 |
| Davie County | 1 | 3 |
| Edgecombe County | 3 | 9 |
| Forsyth County | 2 | 7 |
| Gaston County | 2 | 8 |
| Graham County | 1 | 12 |
| Guilford County | 1 | 1 |
| Halifax County | 2 | 9 |