Winter Air Quality

The air quality in Montana is occasionally affected by inversions during the winter months. Montana DEQ actively monitors air quality impacts caused by inversions and provides updates when necessary.

Individuals experiencing air quality affected by inversions may visit the Today’s Air Website or use the Visibility Guidelines to evaluate air quality in their area.

 
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Today's Air Quality

Hourly fine particulate monitoring concentrations and health impact information for the state of Montana.

Today's Air

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Winter Air Quality Updates

Access to current and archived winter air quality updates.

Most Recent Update

Winter Archive

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Health Effect Categories

Visibility guidelines and health effects from particulate matter.

Health Effect Categories