40 C.F.R. § 52.2271

Classification of regions

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(a) The Texas plan was evaluated on the basis of the following classifications:

Air quality control region	Pollutant
Air quality control region	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Ozone
Abilene-Wichita Falls Intrastate	II	III	III	III	III
Amarillo-Lubbock Intrastate	II	III	III	III	III
Austin-Waco Intrastate	II	III	III	III	I
Brownsville-Laredo Intrastate	I	III	III	III	III
Corpus Christi-Victoria Intrastate	I	II	III	III	I
Midland-Odessa-San Angelo Intrastate	II	II	III	III	III
Metropolitan Houston-Galveston Intrastate	I	I	III	III	I
Metropolitan Dallas-Fort Worth Intrastate	II	III	III	III	I
Metropolitan San Antonio Intrastate	II	III	III	III	I
Southern Louisiana-Southeast Texas Interstate	II	I	III	III	I
El Paso-Las Cruces Alamogordo Interstate	I	IA	III	I	I
Shreveport-Texarkana-Tyler Interstate	II	III	III	III	III

(b) The proposed priority classifications for particulate matter and carbon monoxide submitted by the Governor on March 21, 1975 are disapproved.

(c) The revision of section II, classification of regions, submitted by the Texas Air Control Board with the semiannual in 1975 is disapproved.

[37 FR 10895, May 31, 1972, as amended at 39 FR 16347, May 8, 1974; 42 FR 20131, Apr. 18, 1977; 42 FR 27894, June 1, 1977; 45 FR 19244, Mar. 25, 1980]