Air Quality in the Helena Valley

(See the Visibility Chart at the bottom of this page for more information about how to assess air quality and its impacts on health.)

Today's Air Quality: GOOD

The Environmental Services Division of the health department monitors year-round the fine-particulate air pollution in the Air Pollution Control District (see map at right).

It also enforces local outdoor air-quality regulations that were adopted to protect the health of area residents by controlling emissions of fine particulate pollution, also known as PM2.5

Fine-particulate air pollution includes soot, combustion byproducts, and liquid pollutants in the air.

Exposure to fine particulates can harm human health, especially among individuals with existing lung diseases. Studies have linked fine-particulate pollution to an increase in hospital admissions and emergency room visits.

Get Current Air Quality Conditions

Visibility Chart and Health Recommendations 

Some communities, like Helena, have air-quality programs and use monitoring equipment to determine whether air quality is good or bad. But smoke conditions can change quickly. Published air-quality reports may not keep up with these changes. Sometimes visibility – how far you can see through the smoke – can be a better way to determine health hazards.

Air Quality StatusVisibilityRecommendation
Good13 miles or moreEnjoy outdoor activities. No limitations.
Moderate9-13 milesMay make existing heart or lung disease worse.
Unhealthy for Sensitive Groups5-9 milesIncreased likelihood of breathing problems in sensitive people, including those with heart or lung disease, the elderly, and children. These individuals should limit strenuous activity outside.
Unhealthy for All Groups2-5 milesIncreased breathing problems in the general population as well as in those with heart or lung disease. The elderly and people with heart or lung disease should avoid prolonged exertion outdoors. The general population should limit prolonged exertion outdoors.

Very Unhealthy/

Less than 2 milesSerious increase in breathing problems, even in healthy people. Premature death possible in the elderly and people with heart or lung disease. Sensitive people should stay indoors. Everyone should avoid all outdoor exertion.


Find Us

Environmental Services
City-County Building
316 North Park, Room 230
Helena, MT 59623
Fax: 406-447-8398

Do You Live in the Air Pollution Control District?

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Outdoor Air Quality

Text of Regulations

Exemption Request Form