40 CFR 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

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