§ 52.1971. Classification of regions.
55 words·~1 min read·
/us/cfr/t40/s§ 52.1971·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The Oregon plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Portland InterstateIIAIIIII Southwest Oregon IntrastateIIIIIIIIIIIIII Northwest Oregon IntrastateIIIIIIIIIIIIIII Central Oregon IntrastateIIIIIIIIIIIIII Eastern Oregon IntrastateIIIIIIIIIIIIII [37 FR 10888, May 31, 1972, as amended at 45 FR 42278, June 24, 1980]