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. Idaho
  8. Classification of regions.

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§ 52.671 Classification of regions.

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

Expand Table
Air quality control region Pollutants
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone
Eastern Idaho Intrastate I II III III III.
Eastern Washington Northern Idaho Interstate (Idaho) I II III III III.
Idaho Intrastate I III III III III.
Metropolitan Boise Intrastate II III III I III.

[37 FR 10861, May 31, 1972, as amended at 45 FR 70261, Oct. 23, 1980; 47 FR 32534, July 28, 1982]


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