CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS > SUBPART Z—Mississippi (§52.1270 to §52.1281) > 52.1271—Classification of regions.

52.1271—Classification of regions.

The Mississippi 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)
Mobile (Alabama)-Pensacola-Panama City (Florida)-Gulfport (Mississippi) Interstate I I III III I
Metropolitan Memphis Interstate I III III III I
Mississippi Delta Intrastate III III III III III
Northeast Mississippi Intrastate II III III III III

Code of Federal Regulations

[37 FR 10875, May 31, 1972, as amended at 39 FR 16346, May 8, 1974]