CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS > SUBPART P—Indiana (§52.769 to §52.798) > 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.

Code of Federal Regulations

[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]