Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Apache County | 49 | 198 |
| Cochise County | 21 | 45 |
| Coconino County | 98 | 377 |
| Gila County | 33 | 101 |
| Graham County | 35 | 185 |
| La Paz County | 7 | 18 |
| Maricopa County | 180 | 1088 |
| Mohave County | 46 | 135 |
| Navajo County | 109 | 605 |
| Pima County | 177 | 994 |
| Pinal County | 1 | 0 |
| Santa Cruz County | 50 | 474 |
| Yavapai County | 34 | 49 |
| Yuma County | 32 | 119 |