Health Effects Categories

Current hour unavailable
No health impacts are expected when air quality is in this range.
Unusually sensitive people should consider limiting prolonged outdoor exertion.
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion.
Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
All children and adults should avoid or limit all outdoor exertion.
Hazardous
Very Unhealthy
Unhealthy
Unhealthy for
Sensitive Groups
Moderate
Good
Current Hour
Unavailable

 

Explanation of Categories Breakpoints and Associated Visibility for Particulate Concentrations.















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Today's Air Quality Conditions

Wildfire Smoke Update


Health Effects Category by Air Monitoring Station
Based on Average Measured Concentrations of Particulate Matter 2.5

As Of Hour Ending 3:00 AM MDT on 8/27/2014 
Billings Air Quality is Good.Birney Air Quality is Good.Bozeman Air Quality is Good.Broadus Air Quality is Good.Butte Air Quality is Good.Flathead Valley Air Quality is Good.Frenchtown Air Quality is Good.Great Falls Air Quality is Good.Hamilton Air Quality is Good.Helena Air Quality is Good.Lewistown Air Quality is Good.Libby Air Quality is Good.Malta Air Quality is Good.Missoula Air Quality is Good.Seeley Lake Air Quality is Good.Sidney Air Quality is Good.West Yellowstone Air Quality is Good.