§ 52.771 - Classification of regions.

§ 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]