Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Adams County | 12 | 83 |
| Allen County | 2 | 0 |
| Ashland County | 3 | 7 |
| Ashtabula County | 2 | 7 |
| Athens County | 18 | 80 |
| Auglaize County | 1 | 1 |
| Belmont County | 9 | 26 |
| Brown County | 2 | 11 |
| Butler County | 7 | 21 |
| Clark County | 1 | 0 |
| Clermont County | 7 | 79 |
| Clinton County | 3 | 2 |
| Columbiana County | 5 | 12 |
| Coshocton County | 12 | 32 |
| Cuyahoga County | 12 | 36 |
| Darke County | 2 | 2 |
| Delaware County | 19 | 77 |
| Erie County | 17 | 91 |
| Fairfield County | 8 | 16 |
| Franklin County | 23 | 117 |
| Fulton County | 3 | 14 |
| Gallia County | 2 | 7 |
| Geauga County | 3 | 2 |
| Greene County | 6 | 26 |
| Hamilton County | 23 | 122 |