DEQ Air Emission Inventory System

Welcome to, your online tool for entering air emissions for your permitted/registered facility.

For any questions/comments concerning the functionality of this web site or instructions on how to perform actions on this web site, please contact the Montana Department of Environment Quality - Air Quality Bureau at: (406) 444-3490.

For questions concerning your Emission Inventory data please contact your Compliance Officer. If you do not know their contact information, call the number above and ask to speak with your Compliance Officer. If you wish to view the Staff Directory for the Air Quality Bureau follow the link below:

Montana Department of Environmental Quality Staff Directory

Enter Your Logon Information Below.
  (Example: If your name is John Smith, JSmith is your UserName.)
    (ID number emailed to you by DEQ)