GroundRules
40 CFR 52.1321: Classification of regions.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER C—AIR PROGRAMS
- PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
- Subpart AA—Missouri
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
Collected 2026-08-27T02:26:04Z. Source file · JSON