GroundRules
40 CFR 52.1171: 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 X—Michigan
The Michigan plan was evaluated on the basis of the following classifications:
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone
Metropolitan Detroit-Port Huron Intrastate I I III III III
Metropolitan Toledo Interstate I I III III I
South Central Michigan Intrastate II II III III III
South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) Interstate I IA III III III
Central Michigan Intrastate II III III III III
Upper Michigan Intrastate III III III III III
Collected 2026-08-27T02:26:04Z. Source file · JSON