The Wyoming plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control region Photochemical
Particulate Sulfur Nitrogen Carbon oxidants
matter oxides dioxide monoxide (hydrocarbons)----------------------------------------------------------------------------------------------------------------Cheyenne Intrastate.................................. II III III III IIICasper Intrastate.................................... II III III III IIIWyoming Intrastate................................... III III III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10904, May 31, 1972]