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. Michigan
  8. Classification of regions.

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§ 52.1171 Classification of regions.

The Michigan 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
Metropolitan Detroit-Port Huron Intrastate I I III III III
Metropolitan Toledo Interstate I I III III I
South Central Michigan Intrastate II II III III III
South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) Interstate I IA III III III
Central Michigan Intrastate II III III III III
Upper Michigan Intrastate III III III III III

[37 FR 10873, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 29801, May 6, 1980]


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