Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Berkeley County | 4 | 9 |
| Boone County | 2 | 9 |
| Braxton County | 3 | 17 |
| Brooke County | 1 | 6 |
| Cabell County | 6 | 10 |
| Fayette County | 3 | 10 |
| Grant County | 1 | 3 |
| Greenbrier County | 1 | 2 |
| Hancock County | 3 | 8 |
| Hardy County | 0 | 0 |
| Harrison County | 1 | 1 |
| Jackson County | 3 | 4 |
| Jefferson County | 2 | 4 |
| Kanawha County | 21 | 64 |
| Logan County | 7 | 16 |
| Marion County | 1 | 1 |
| Marshall County | 9 | 45 |
| Mason County | 11 | 62 |
| Mercer County | 2 | 5 |
| Mingo County | 1 | 29 |
| Monongalia County | 2 | 4 |
| Nicholas County | 7 | 26 |
| Ohio County | 2 | 5 |
| Pendleton County | 3 | 29 |
| Pleasants County | 1 | 2 |