The Montana Emergency Episode Avoidance Plan was revised with an August 2, 2004 submittal by the Governor. The August 2, 2004 Emergency Episode Avoidance Plan classified the Air Quality Control Regions (AQCR) as follows: --------------------------------------------------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control regions (AQCR) Particulate Nitrogen
matter Sulfur oxide dioxide Carbon monoxide Ozone--------------------------------------------------------------------------------------------------------------------------------------------------------Billings Intrastate AQCR 140....................................... III III III III IIIGreat Falls Intrastate AQCR 141.................................... III III III III IIIHelena Intrastate AQCR 142......................................... III III III III IIIMiles City Intrastate AQCR 143..................................... III III III III IIIMissoula Intrastate AQCR 144....................................... III III III III III-------------------------------------------------------------------------------------------------------------------------------------------------------- [64 FR 68038, Dec. 6, 1999, as amended at 66 FR 31550, June 12, 2001; 71 FR 21, Jan. 3, 2006]