GroundRules
40 CFR 52.121: Classification of regions.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER C—AIR PROGRAMS
- PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
- Subpart D—Arizona
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
Collected 2026-08-27T02:26:04Z. Source file · JSON