The Arizona plan is evaluated on the basis of the following classifications:
| AQCR (constituent counties)
| Classifications
|
|---|
| PM
| SOX
| NO2
| CO
| O3
|
|---|
| Maricopa Intrastate (Maricopa) | I | III | III | I | I
|
| Pima Intrastate (Pima) | I | III | III | III | III
|
| Northern Arizona Intrastate (Apache, Coconino, Navajo, Yavapai) | I | III | III | III | III
|
| Mohave-Yuma Intrastate (La Paz, Mohave, Yuma) | I | III | III | III | III
|
| Central Arizona Intrastate (Gila, Pinal) | I | IA | III | III | I
|
| Southeast Arizona Intrastate (Cochise, Graham, Greenlee, Santa Cruz) | I | IA | III | III | III |