Classification of regions.

§ 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
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