Major sources defined as a source with the potential to emit (PTE):
An operating permit must be obtained for all new and existing major sources of air pollution. Applicants for an air quality operating permit must submit their applications concurrently with any associated pre-construction permit. Existing facilities required to obtain an air quality operating permit must do so on a schedule determined by the DEQ. The application for an air quality operating permit is the same as for any air quality stationary pre-construction permit.
DEQ Sage Grouse Advisory. Certain exceptions may apply to Air Quality Program projects.
To access the necessary applications and their instructions, please click on one of the following:
The DEQ issues Montana Air Quality Permits for both stationary sources and portable emitting units. If a facility has the ability to move the emitting units from site to site it would be considered portable. Both the stationary and portable source applications are available below.
With respect to statutory timeframes, the overall permitting timeframe depends on the nature of the application. Applications subject to Title V synthetic minor limits, New Source Review, an EIS, or the Incinerator Rule are required to have a 30-day public comment period as opposed to the 15-day public comment period for other applications. Both permit timeframe flowcharts are available below.
You may wish to access these additional sources of information:
The Montana Department of Environmental Quality is charged with protecting a clean and healthy environment as guaranteed to our citizens by our State Constitution. Our ultimate goal is to protect public health and to maintain Montana's
high quality of life for current and future generations.