40 CFR § 52.771 - Classification of regions.

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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

(b) The requirements of § 51.150 of this chapter are not met by the classification of counties in APC–22 for the purposes of attainment and maintenance of the total suspended particulate ambient air quality standards.

(c) The requirements of § 51.150 of this chapter are not met by the classification of counties in APC–22 for the purposes of attainment and maintenance of the photochemical oxidant (hydrocarbon) ambient air quality standards.

(d) The requirements of § 51.150 of this chapter are not met by the classification of Jefferson, LaPorte, Porter, Vigo and Warrick Counties in Indiana in Regulation APC–22 for the purposes of attainment and maintenance of the sulfur dioxide ambient air quality standards.

[37 FR 10863, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 40 FR 50033, Oct. 28, 1975; 41 FR 35677, Aug. 24, 1976; 42 FR 34519, July 6, 1977; 51 FR 40675, Nov. 7, 1986]