40 C.F.R. § 52.1321

Classification of regions.

Last amended: 2016Year: 2026Length: 85 wordsOfficial source

Cite as 40 C.F.R. § 52.1321 (2026)

The Missouri plans were evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons) Metropolitan Kansas City Interstate I III III I I Southwest Missouri Intrastate I III III III III Southeast Missouri Intrastate III III III III III Northern Missouri Intrastate II III III III III Metropolitan St. Louis Interstate I I III I I [37 FR 10875, May 31, 1972, as amended at 39 FR 16347, May 8, 1974]
40 C.F.R. § 52.1321: Classification of regions. | Justis AI