515
AEUS75 KTFX 041448
AQAMT
MTC001-023-039-061-063-077-081-089-051500-

Air Quality Alert
Relayed by National Weather Service Great Falls MT
848 AM MDT Thu Sep 4 2025

...AIR QUALITY ALERT IN EFFECT...

The Montana Department of Environmental Quality has issued an air
quality alert for Beaverhead, Deer Lodge, Granite, Mineral, Missoula,
Powell, Ravalli, Sanders counties in effect until 9AM on 09/05/2025
An Air Quality Alert means that particulates have been trending
upwards and that an exceedence of the 24 hour National Ambient Air
Quality Standard (NAAQS) has occurred or may occur in the near
future.

Elevated particulate levels from wildfire smoke

As of 7AM on 09/04/2025, particulate levels in Lewistown are
Unhealthy for Sensitive Groups.

As of 7AM on 09/04/2025, particulate levels in Billings, Butte,
Columbia Falls, Cut Bank, Dillon, Frenchtown, Glendive, Great Falls,
Hamilton, Havre, Helena, Miles City, Missoula, Seeley Lake, Sidney,
Sleeping Giant and Thompson Falls are Moderate.

When air quality is Unhealthy for Sensitive Groups... State and local
health officials recommend that people with respiratory or heart
disease, the elderly and children should limit prolonged exertion.

When air quality is Moderate... State and local health officials
recommend that unusually sensitive people should consider reducing
prolonged or heavy exertion.

For more information visit the Montana Department of Environmental
Quality at http://todaysair.mtdeq.us



$$

MTC029-035-047-053-041515-

Air Quality Alert
Relayed by National Weather Service Great Falls MT
845 AM MDT Thu Sep 4 2025

The Air Quality Alert for Flathead, Glacier, Lake and Lincoln
Counties has been cancelled.

For more information visit the Montana Department of Environmental
Quality at www.todaysair.mt.gov


$$