The North Carolina 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)----------------------------------------------------------------------------------------------------------------Western Mountain Intrastate.......................... I III III III IIIEastern Mountain Intrastate.......................... I III III III IIIMetropolitan Charlotte Interstate.................... I II III III INorthern Piedmont Intrastate......................... I III III III IIIEastern Piedmont Intrastate.......................... I III III III IIINorthern Coastal Intrastate.......................... I III III III IIISouthern Coastal Intrastate.......................... II III III III IIISandhills Intrastate................................. II III III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10884, May 31, 1972]