Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Polk County | 4 | 7 |
| Sherman County | 2 | 6 |
| Tillamook County | 45 | 101 |
| Umatilla County | 7 | 21 |
| Union County | 6 | 33 |
| Wallowa County | 10 | 23 |
| Wasco County | 14 | 83 |
| Washington County | 0 | 0 |
| Wheeler County | 6 | 29 |
| Name | Sites | Samples |
|---|---|---|
| Polk County | 4 | 7 |
| Sherman County | 2 | 6 |
| Tillamook County | 45 | 101 |
| Umatilla County | 7 | 21 |
| Union County | 6 | 33 |
| Wallowa County | 10 | 23 |
| Wasco County | 14 | 83 |
| Washington County | 0 | 0 |
| Wheeler County | 6 | 29 |