Classification of regions.

§ 52.1221 Classification of regions.

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

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Central Minnesota IntrastateIIIIIIIIIIIIII
Southeast Minnesota-La Crosse (Wisconsin) InterstateIIIaIIIIIIIII
Duluth (Minnesota)-Superior (Wisconsin) InterstateIIIIIIIIIIII
Metropolitan Fargo-Moorhead InterstateIIIIIIIIIIIIII
Minneapolis-St. Paul IntrastateIIIIIIIII
Northwest Minnesota IntrastateIIIIIIIIIIIIII
Southwest Minnesota IntrastateIIIIIIIIIIIIIII
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