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§ 52.771 Classification of regions.
(a) The Indiana 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) | |
East Central Indiana Intrastate | II | II | III | III | III |
Evansville (Indiana)-Owensboro-Henderson (Kentucky) Interstate | I | II | III | III | III |
Louisville Interstate | I | I | III | III | I |
Metropolitan Chicago Interstate (Indiana-Illinois) | I | I | I | I | I |
Metropolitan Cincinnati Interstate | I | II | III | III | I |
Metropolitan Indianapolis Intrastate | I | I | I | I | I |
Northeast Indiana Intrastate | II | III | III | III | III |
South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) Interstate | I | IA | III | III | III |
Southern Indiana Intrastate | IA | IA | III | III | III |
Wabash Valley Intrastate | I | I | III | III | III |