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§ 52.1421 Classification of regions.
The Nebraska 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) | |
Metropolitan Omaha-Council Bluffs Interstate | I | II | III | III | III |
Lincoln-Beatrice-Fairbury Intrastate | II | III | III | III | III |
Metropolitan Sioux City Interstate | III | III | III | III | III |
Nebraska Intrastate | III | III | III | III | III |