§ 52.1921. Classification of regions.
66 words·~1 min read·
/us/cfr/t40/s§ 52.1921·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The Oklahoma plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Central Oklahoma IntrastateIIIIIIIIIII Northeastern Oklahoma IntrastateIIIIIIIIIII Southeastern Oklahoma IntrastateIIIIIIIIIIIIIII North Central Oklahoma IntrastateIIIIIIIIIIIIIII Southwestern Oklahoma IntrastateIIIIIIIIIIIIIII Northwestern Oklahoma IntrastateIIIIIIIIIIIIIII Metropolitan Fort Smith InterstateIIIIIIIIIIIIII Shreveport-Texarkana-Tyler InterstateIIIIIIIIIIIIII [37 FR 10887, May 31, 1972, as amended at 45 FR 9741, Feb. 13, 1980]