DEQ Air

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About Air


In Montana we're proud of our big sky and clean air. We protect our air quality through monitoring, permitting, and compliance assistance. Our year-round monitoring and wildfire smoke updates help people make informed decisions about outdoor activities. Citizens can rely on us to improve and preserve Montana's air quality now and for the future. 

Current Air Quality


The Purpose of Montana’s ambient air monitoring network is to monitor, assess and provide information on statewide air quality conditions and trends as specified by the Montana and Federal Clean Air Acts. The Air Quality Monitoring Program works in conjunction with local air pollution agencies and some industries, measuring air quality throughout Montana. This data provides the factual basis for regulatory decisions as well as provides air quality information to our local counterparts and the public.

Business & Industry


Montana strives to protect its citizens and environment by protecting air quality. We do this through permitting or registering sources of air emissions and assisting managers of those sources to maintain compliance with requirements. Our permitting, registration, and compliance activities ensure that regulations are uniformly applied within the framework of the Administrative Rules of Montana. Here you will find information to assist businesses, industry, and the public to understand air permits, including when a permit is required, statutory process, and how to apply for a permit or become a registered facility. Information on compliance requirements is also contained within this section.

Smoke & Fire


Smoke impacts Montana in a number of ways. During the summer, wildfires both here in Montana and those far away can cause significant smoke impacts to our communities. During the winter, inversions can trap pollutants in our valleys. Open burning can also be a source of smoke. Here you can find resources to learn about current air quality, wildfire forecasts, open burning rules, and health effects from smoke and fire.

Standards & Regulations


The Standards and Regulations Section is a guide on how to follow Montana State Rules and Standards.

Public Engagement


Public Engagement provides information on how to get involved in the Air Program.