Title 40

SECTION 52.2621

52.2621 Classification of regions.

§ 52.2621 Classification of regions.

The Wyoming 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)
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]