Classification of regions.

§ 52.2321 Classification of regions.

The Utah 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)
Wasatch Front IntrastateIIIII
Four Corners InterstateIAIAIIIIIIIII
Utah IntrastateIIIIIIIIIIIIIII
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