The Kentucky plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control region Photochemical
Particulate Sulfur Nitrogen Carbon oxidants
matter oxides dioxide monoxide (hydrocarbons)----------------------------------------------------------------------------------------------------------------Appalachian Intrastate............................... II III III III IIIBluegrass Intrastate................................. II III III III IIIEvansville (Indiana)-Owensboro-Henderson (Kentucky) I II III III III
Interstate..........................................Huntington (West Virginia)-Ashland (Kentucky)- I III III III III
Portsmouth-Ironton (Ohio) Interstate................Louisville Interstate................................ I I III III IMetropolitan Cincinnati Interstate................... I II III III INorth Central Kentucky Intrastate.................... II III III III IIIPaducah (Kentucky)-Cairo (Illinois) Interstate....... I II III III IIISouth Central Kentucky Intrastate.................... III III III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10868, May 31, 1972, as amended at 39 FR 16346, May 8, 1974] Sec. 52.922 [Reserved]