| Observations | Missing | Basin Range | California | Mid-Atlantic | Mid-West | Pacific NW | SE Coast | |
| Region | 204 | 0 | 44 | 28 | 23 | 8 | 29 | 72 |
| Active | 75 | 0 | 23 | 14 | 12 | 3 | 7 | 16 |
| Inactive | 55 | 0 | 12 | 3 | 3 | 3 | 5 | 29 |
| Test/Study | 74 | 0 | 9 | 11 | 8 | 2 | 17 | 27 |
| % Success of Non-Testing/Study Sites | 66% | 82% | 80% | 50% | 58% | 36% |