Classification of regions.

§ 52.2471 Classification of regions.

The Washington plan was evaluated on the basis of the following classifications:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen
dioxide
Carbon
monoxide
Ozone
Eastern Washington-Northern Idaho InterstateIIAIIIIIIIII
Northern Washington IntrastateIIIIIIIIIIIIII
Olympic-Northwest Washington IntrastateIIIIIIIIIIIII
Portland InterstateIIAIIIIIIIII
Puget Sound IntrastateIIAIIIIIII
South Central Washington IntrastateIIIIIIIIIIIII
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