40 CFR § 52.121
Classification of regions
June 9, 2020
The Arizona plan is evaluated on the basis of the following classifications:
Open Table
| AQCR (constituent counties) | Classifications | ||||
|---|---|---|---|---|---|
| PM | SOX | NO2 | CO | O3 | |
| Maricopa Intrastate (Maricopa) | I | III | III | I | I |
| Pima Intrastate (Pima) | I | III | III | III | I |
| Northern Arizona Intrastate (Apache, Coconino, Navajo, Yavapai) | I | III | III | III | III |
| Mohave-Yuma Intrastate (Mohave, Yuma) | I | III | III | III | III |
| Central Arizona Intrastate (Gila, Pinal) | I | IA | III | III | III |
| Southeast Arizona Intrastate (Cochise, Graham, Greenlee, Santa Cruz) | I | IA | III | III | III |
[83 FR 42219, Aug. 21, 2018]
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