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    Air Quality Monitoring Sites
 Billings–Coburn Road   Coburn Hill Road 
 ID #: 30-111-0066  Latitude: 45.78667  Longitude: -108.45778 Elevation: 1035 M 
  Photo of Billings–Coburn Road This neighborhood scale historical SO2 monitoring site is located on high ground south of the Conoco and Exxon refineries and has operated for the last three decades. It measures some of the highest SO2 levels in the Billings area and exists to monitor compliance with the federal and state SO2 ambient air standards. 
  
Map of Billings–Coburn Road