Existing Facilities

The Air Quality Bureau at Montana DEQ has both permitting and registration programs for industry in Montana. Registered sources in Montana include oil and gas facilities, crushers and screens, concrete batch plants, and asphalt plants. All other industry would fall under our permitting program. Click below to find more information about existing permitting and registration sources, including what to do if a change of ownership occurs, how to enter annual emission inventory, and how to meet compliance requirements.