Table 2-2 Ambient Air Quality Standards - State of Maine 



Pollutant 

 Sulfer Dioxide 



Averaging Time 



Annual Arithmetic Mean 

 24 hours 

 3 hours 



Standards 



57 uglm3 



230 uglm3 



1150 uglm3 



Particulate 

 Matter 



Annual Geometric Mean 

 24 hours 



60 uglm3 

 150 uglm3 



Carbon 

 Monoxide 



8 hours 

 1 hour 



10 mglm3 

 40 mglm3 



Photo-Chemical 

 Oxidants 



1 hour 



160 uglm3 



Hydrocarbons 



3 hours 



160 uglm3 



Nitrogen Dioxide 24 hours 



100 uglm3 



Source (DEP 1979) 



These standards are applicable in all ambient air quality control 

 regions of the State of Maine. All ambient air quality standards 

 are expressed at 25 degrees centigrade and 760 millimeters of 

 mercury pressure. 



3-C-6 



