Classification of regions.

§ 52.821 Classification of regions.

The Iowa plan was evaluated on the basis of the following classification:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Metropolitan Omaha-Council Bluffs InterstateIIIIIIIIIIII
Metropolitan Sioux Falls InterstateIIIIIIIIIIIIII
Metropolitan Sioux City InterstateIIIIIIIIIIIIIII
Metropolitan Dubuque InterstateIIIIIIIIIIIII
Metropolitan Quad Cities InterstateIIIIIIIIIIIII
Burlington-Keokuk InterstateIIIIIIIIIII
Northwest Iowa IntrastateIIIIIIIIIIIIIII
North Central Iowa IntrastateIAIIIIIIIIIIII
Northeast Iowa IntrastateIIIIIIIIIIIII
Southwest Iowa IntrastateIIIIIIIIIIIIIII
South Central Iowa IntrastateIIIIIIIIIII
Southeast Iowa IntrastateIIIIIIIIIIIIIII
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