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§ 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 |