The Tennessee plan was evaluated on the basis of the following classifications:

Open Table
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]


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