40 C.F.R. § 52.2471

Current through October 31, 2024
Section 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

40 C.F.R. §52.2471

81 FR 1131 , Jan. 11, 2016