GroundRules
40 CFR 52.51: 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 B—Alabama
The Alabama plan was evaluated on the basis of the following classifications:
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Alabama & Tombigbee Rivers Intrastate II III III III III
Columbus (Georgia)-Phenix City (Alabama) Interstate I III III III III
East Alabama Intrastate I III III III III
Metropolitan Birmingham Intrastate I II III I I
Mobile (Alabama)-Pensacola-Panama City (Florida)-Southern Mississippi Interstate I I III III I
Southeast Alabama Intrastate II III III III III
Tennessee River Valley (Alabama)-Cumberland Mountains (Tennessee) Interstate I I III III III
Collected 2026-08-27T02:26:04Z. Source file · JSON