40 C.F.R. § 52.871
Classification of regions.
Cite as 40 C.F.R. § 52.871 (2026)
The Kansas 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) Metropolitan Kansas City Interstate I III III I I South Central Kansas Intrastate I III III III I Northeast Kansas Intrastate I III III III III Southeast Kansas Intrastate III III III III III North Central Kansas Intrastate I III III III III Northwest Kansas Intrastate I III III III III Southwest Kansas Intrastate I III III III III [37 FR 10867, May 31, 1972]