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. Minnesota
  8. Classification of regions.

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§ 52.1221 Classification of regions.

The Minnesota 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 Photochemical oxidants (hydrocarbons)
Central Minnesota Intrastate II III III III III
Southeast Minnesota-La Crosse (Wisconsin) Interstate II Ia III III III
Duluth (Minnesota)-Superior (Wisconsin) Interstate I II III III III
Metropolitan Fargo-Moorhead Interstate II III III III III
Minneapolis-St. Paul Intrastate I I III I III
Northwest Minnesota Intrastate II III III III III
Southwest Minnesota Intrastate III III III III III

[37 FR 10874, May 31, 1972, as amended at 39 FR 16346, May 8, 1974]


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