Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Adams County | 1 | 1 |
| Allegheny County | 17 | 192 |
| Armstrong County | 8 | 20 |
| Beaver County | 8 | 36 |
| Bedford County | 8 | 26 |
| Berks County | 6 | 19 |
| Blair County | 8 | 27 |
| Bradford County | 14 | 42 |
| Bucks County | 3 | 27 |
| Butler County | 3 | 9 |
| Cameron County | 3 | 4 |
| Carbon County | 2 | 5 |
| Centre County | 9 | 41 |
| Chester County | 8 | 35 |
| Clarion County | 5 | 30 |
| Clearfield County | 4 | 34 |
| Clinton County | 13 | 144 |
| Columbia County | 4 | 40 |
| Crawford County | 4 | 13 |
| Dauphin County | 5 | 53 |
| Elk County | 2 | 11 |
| Erie County | 10 | 38 |
| Fayette County | 11 | 53 |
| Forest County | 2 | 7 |
| Franklin County | 2 | 8 |