Montana Air Quality Nonattainment Status

MONTANA  COMMUNITY  DESIGNATION  STATUS1

Reference:  40 CFR 81.327


Community

Pollutant
Non-
Attainment
Attainment/
Unclassified

SIP Call2
Laurel Sulfur Dioxide X    
East Helena Sulfur Dioxide X    
Billings Sulfur Dioxide     X
Billings Carbon Monoxide   X  
Great Falls Carbon Monoxide   X  
Missoula Carbon Monoxide   X  
Kalispell Carbon Monoxide     X
East Helena Lead X    
Kalispell Particulate (PM-10) X    
Columbia Falls Particulate (PM-10) X    
Whitefish Particulate (PM-10) X    
Libby Particulate (PM-10) X    
Libby Particulate (PM-2.5) X    
Missoula Particulate (PM-10)    
Thompson Falls Particulate (PM-10) X    
Butte Particulate (PM-10) X    

1. Only includes state-regulated communities.
2. SIP Call actions under Federal Clean Air Act authority Section 110(k)(5). These are not nonattainment areas.