Title 40

SECTION 52.921

52.921 Classification of regions.

§ 52.921 Classification of regions.

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
[37 FR 10868, May 31, 1972, as amended at 39 FR 16346, May 8, 1974]