GroundRules
40 CFR 52.921: 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 S—Kentucky
The Kentucky 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)
Appalachian Intrastate II III III III III
Bluegrass Intrastate II III III III III
Evansville (Indiana)-Owensboro-Henderson (Kentucky) Interstate I II III III III
Huntington (West Virginia)-Ashland (Kentucky)-Portsmouth-Ironton (Ohio) Interstate I III III III III
Louisville Interstate I I III III I
Metropolitan Cincinnati Interstate I II III III I
North Central Kentucky Intrastate II III III III III
Paducah (Kentucky)-Cairo (Illinois) Interstate I II III III III
South Central Kentucky Intrastate III III III III III
Collected 2026-08-27T02:26:04Z. Source file · JSON