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

Open Table
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Cheyenne Intrastate II III III III III
Casper Intrastate II III III III III
Wyoming Intrastate III III III III III

[37 FR 10904, May 31, 1972]


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