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Air Quality - Air Quality Status Report


Air Quality in the Missoula area is currently Good to Moderate.  This web page will be updated if air quality becomes Unhealthy for Sensitive Groups or worse.   

 

Wildfires continue in Idaho and other western states, but smoke impacts are expected to be minimal for the immediate future. 

 

PHOTOS and MAPS

None at this time.

 

Woodstove restrictions are not in effect for the Missoula Air Stagnation Zone at this time

Inside the Missoula Air Stagnation Zone (Air Stagnation Zone as .jpg) visible emissions are currently allowed from woodstoves, fireplaces or other solid fuel burning devices.  The department request that people who do use their stoves burn as cleanly as possible.

 

During a Stage II Air Warning, woodstove restrictions are in effect for Impact Zone M (outlined in red).  See Stage II Air Warning pamphlet for more information.

 

This web page is not updated on weekends or holidays unless air quality becomes Unhealthy for Sensitive Groups or worse.  Call the air quality hotline at 258-3600 on weekends to get the most current air quality update.

 

If you operate a woodstove, fireplace or other solid-fuel burning device, you will want to get in the habit of checking this web page or the Air Quality hotline (258-3600) for up-to-date changes in Missoula's air quality.  Woodstoves, fireplaces and other solid-fuel burning devices are restricted during alerts and warnings.

 

Seeley Lake particulate air quality can be highly variable, so consult the "Today's Air" web page for the most current information.  High levels of air pollution are typically localized at the neighborhood scale in Seeley Lake; regional air quality is usually better than the neighborhood scale air quality measured at the elementary school.  The Seeley Lake air monitor shown on "Today's Air" is located at the elementary school playground.

 

This web page is not updated on weekends or holidays unless air quality becomes Unhealthy for Sensitive Groups or worse.  Call the air quality hotline at 258-3600 on weekends to get the most current air quality update.

 

Air Alerts and Warnings informational pamphlets:

Stage I Air Alert

Stage II Air Warning

If you are being affected by smoke please use the visibility guidelines to determine your exposure levels and adjust your activity levels accordingly. Anyone experiencing heart or lung distress related to smoke exposure is advised to contact their health care provider.

Over the weekend please call the Air Quality Hotline at 258-3600 for updates as this website will be inactive over weekends and holidays.

Hourly monitoring data can be viewed here at the Montana Department of Environmental Quality Today's Air Website.            Today's Air

Air quality categories are as follows:

During wildfires, air quality conditions change rapidly depending on wind direction and proximity to fires. Other areas of the county may have different levels of air quality. Please use the visibility guidelines to evaluate the conditions at your location.

You can also use the visibility guidelines to check your local conditions.

Emergency Episode Avoidance Plan

Air Quality Status is based on 1-3 hour or 8-hour average particulate matter levels. The following chart outlines health effects, cautionary statements, and recommended actions for each air quality category.

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Air Quality
Categories
Particulate
Matter Level
(in micrograms per cubic meter)
Visibility
Ranges
Health Effects Cautionary
Statements
Action
GOOD 0-19
8-hour average

0-34
1-3 hour average
13 Miles and up None None None
MODERATE 19-29
8-hour average

34-51
1-3 hour average
9 to 13 Miles Possible aggravation of heart and lung disease None None
UNHEALTHY FOR
SENSITIVE GROUPS
29-51
8-hour average

51-89
1-3 hour average
5 to 9 miles Increasing likelihood of symptoms in sensitive individuals, aggravation of heart or lung disease and premature death in persons with cardiopulmonary disease, smokers and the elderly.  People with heart or lung disease, smokers, children and the elderly should:
limit prolonged exposure
None
UNHEALTHY 51-115
8 hour average

89-201
1-3 hour average
2.25 to 5 miles Increased aggravation of heart or lung disease and premature death in persons with cardiopulmonary disease, smokers and the elderly; increased respiratory effects in general population. People with heart or lung disease, smokers, children and the elderly should:

· limit heavy or prolonged exertion; and

· limit time spent outdoors.

People with asthma should follow asthma management plan.

People experiencing symptoms of heart or lung disease associated with smoke exposure should contact their health care provider.
Outdoor burning, incinerators and non-permitted stove use suspended.

Advise industrial, commercial and construction sources to operate as cleanly as possible.
VERY UNHEALTHY 115-195
8 hr. average

201-339
1-3 hour average
1.25 to 2 miles Significant aggravation of heart or lung disease and premature death in persons with cardiopulmonary disease, smokers, and the elderly; significant increase in respiratory effects in general population. People with heart or lung disease, smokers, children and the elderly should

· avoid heavy or prolonged exertion; and

· stay indoors when possible

People with asthma should follow asthma management plan.

People experiencing symptoms of heart or lung disease associated with smoke exposure should contact their health care provider.

Everyone else should:

· limit prolonged exertion and

· limit time spent outdoors.
Outdoor burning, incinerators and non-permitted stove use suspended.

Advise industrial, commercial and construction sources to operate as cleanly as possible

Recommend no outdoor activity for persons under 18

Recommend cancellation of outdoor public gatherings, especially athletic events, activities, and practices
HAZARDOUS 195+
8 hr. average

339+
1-3 hour average
1.25 miles or less Serious aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease, smokers, and the elderly; serious risk of respiratory effects in general population. People with heart or lung disease, smokers, children and the elderly should avoid any outdoor activity.

People with asthma should follow asthma management plan.

People experiencing symptoms of heart or lung disease associated with smoke exposure should contact their health care provider.

Everyone else should:

· avoid heavy and prolonged exertion and

· limit time spent outdoors.
Outdoor burning, incinerators and non-permitted stove use suspended.

Advise industrial, commercial and construction sources to operate as cleanly as possible

Recommend no outdoor activity for persons under 18

All (indoor and outdoor) athletic events, activities and practices canceled.

The department may also institute any of the advisories and requirements listed in the Missoula County Air Stagnation Plan, if deemed necessary to protect public health.

For additional wildfire smoke health information, visit our Wildfire Smoke Information page.

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