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

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

As Of Hour Ending 12:00 AM MDT on 10/22/2014 
Billings Air Quality is Current Hour Unavailable.Birney Air Quality is Current Hour Unavailable.Bozeman Air Quality is Current Hour Unavailable.Broadus Air Quality is Current Hour Unavailable.Butte Air Quality is Current Hour Unavailable.Flathead Valley Air Quality is Current Hour Unavailable.Frenchtown Air Quality is Current Hour Unavailable.Great Falls Air Quality is Current Hour Unavailable.Hamilton Air Quality is Current Hour Unavailable.Helena Air Quality is Current Hour Unavailable.Lewistown Air Quality is Current Hour Unavailable.Libby Air Quality is Current Hour Unavailable.Malta Air Quality is Current Hour Unavailable.Missoula Air Quality is Current Hour Unavailable.Seeley Lake Air Quality is Current Hour Unavailable.Sidney Air Quality is Current Hour Unavailable.West Yellowstone Air Quality is Current Hour Unavailable.