Classification of regions.

  1. Law
  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Air Programs
  6. Approval and Promulgation of Implementation Plans
  7. Washington
  8. Classification of regions.

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§ 52.2471 Classification of regions.

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

Expand Table
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen
dioxide 		Carbon
monoxide 		Ozone
Eastern Washington-Northern Idaho Interstate I IA III III III
Northern Washington Intrastate II III III III III
Olympic-Northwest Washington Intrastate II II III III III
Portland Interstate I IA III III III
Puget Sound Intrastate I IA III III I
South Central Washington Intrastate I III III III III

[81 FR 1131, Jan. 11, 2016]


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