40 C.F.R. § 52.1971

Current through September 30, 2024
Section 52.1971 - Classification of regions

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

40 C.F.R. §52.1971

37 FR 10888, May 31, 1972, as amended at 45 FR 42278, June 24, 1980