40 CFR 52.2221 - Classification of regions.

The Tennessee 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)	Eastern Tennessee-Southwestern Virginia Interstate	I	I	III	III	III	Tennessee River Valley-Cumberland Mountains Intrastate	I	I	III	III	III	Middle Tennessee Intrastate	I	II	III	III	I	Western Tennessee Intrastate	I	III	III	III	III	Chattanooga Interstate	I	II	III	III	III	Metropolitan Memphis Interstate	I	III	III	III	I

[37 FR 10894, May 31, 1972, as amended at 39 FR 16347, May 8, 1974]