The Wisconsin plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control region Particulate Sulfur Nitrogen Carbon
matter oxides dioxide monoxide Ozone----------------------------------------------------------------------------------------------------------------Duluth (Minnesota)-Superior (Wisconsin) Interstate........ I II III III IIINorth Central Wisconsin Intrastate........................ II III III III IIILake Michigan Intrastate.................................. II III III III IIISoutheast Minnesota-La Crosse (Wisconsin) Interstate...... II IA III III IIISouthern Wisconsin Intrastate............................. II III III III IIISoutheastern Wisconsin Intrastate......................... I II III III IRockford (Illinois)-Jamesville-Beloit (Wisconsin) II III III III III
Interstate...............................................Metropolitan Dubuque Interstate........................... I III III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10902, May 31, 1972, as amended at 39 FR 16348, May 8, 1974; 45 FR 2322, Jan. 11, 1980]