Classification of regions.

§ 52.2171 Classification of regions.

The South Dakota plan evaluated on the basis of the following classifications:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Metropolitan Sioux City InterstateIIIIIIIIIIIIIII
Metropolitan Sioux Falls InterstateIIIIIIIIIIIIII
Black Hills—Rapid City IntrastateIIIIIIIIIIIIIII
South Dakota IntrastateIIIIIIIIIIIIIII
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