40 CFR 52.1321 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 52.1019 To §§ 52.1992-52.2019) — Environmental Protection Agency (Continued) (§ 52.1019 To §§ 52.1992-52.2019) — Air Programs (Continued) (§ 52.1019 To §§ 52.1992-52.2019) — Approval And Promulgation Of Implementation Plans (Continued) (§ 52.1019 To §§ 52.1992-52.2019) — Missouri (§ 52.1319 To § 52.1342) — Classification of regions.

4 Aug 2016

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
40 CFR 52.1321
[37 FR 10875, May 31, 1972, as amended at 39 FR 16347, May 8, 1974]