Missoula, MT
Long-term air quality
What this page tells you
This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.
Missoula, MT air quality summary: Missoula, MT maintains a Clean Air Score of 81.4 and an air quality grade of B. The city's annual PM2.5 mean concentration is measured at 5.4 micrograms per cubic meter. Missoula has a recorded annual PM2.5 mean of 5.4, which represents moderate or acceptable but still relevant for long-term exposure. The long-term air quality trend in Missoula is currently characterized as improving over recent years.
Clean Air Score
The Clean Air Score of 81.4 and grade of B reflect the long-term averages of fine particulate matter in the local atmosphere. These metrics are designed to help residents evaluate the cumulative air quality environment in Missoula over multiple years.
🏡 What This Means for Buying
For those evaluating a home purchase or relocation in Missoula, the long-term air quality metrics provide one data point for consideration. Prospective residents should treat air quality data as a component of their broader housing and lifestyle research.
Indoor Air Quality in Missoula, MT
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
How to react when today's AQI changes
Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in Missoula.
AQI 0-50
GoodOpen windows: Open windows if you want fresh air.
Air purifier: No purifier needed for most homes.
Indoor activity: Normal indoor activity is fine.
AQI 51-100
ModerateOpen windows: Sensitive groups should limit open-window time.
Air purifier: Use fans or filtration if dust or pollen is bothering you.
Indoor activity: Most people can stay active indoors.
AQI 101-150
Unhealthy for Sensitive GroupsOpen windows: Keep windows closed.
Air purifier: Run a HEPA purifier in the main room and bedroom.
Indoor activity: Sensitive groups should reduce outdoor exposure.
AQI 151+
UnhealthyOpen windows: Keep windows and doors closed.
Air purifier: Run HEPA continuously and seal obvious drafts.
Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.
Common indoor air concerns in Missoula:
- Seasonal pollen and dust mite allergens
- VOCs from household products
Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.
Top Products for Missoula Homes:
🩺 My Health Risk Assessment
See how Missoula's air quality affects you and your family specifically.
Health Advice
Enjoy the outdoors! Air quality is great.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Missoula's air quality improved by 1.3 μg/m³. Based on NBER studies, this change correlates with a estimated 5.2% increase in relative property value retention.
Cleaner Alternatives in MT
No cleaner cities found in this state. Missoula is already a top performer!
🏆 Best Neighborhoods in Missoula
We analyzed air quality across multiple zip codes to find the healthiest spots to live. See which neighborhoods ranked #1.
Why Missoula earned a 81.4
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
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📅 Past 30 Days Trend
Real-time daily PM2.5 AQI
🌸 Pollen Outlook
Current Seasonal Forecast
How it worksBased on current seasonal forecast data. Not a long-term pollution rating or relocation score.
Score Breakdown
| Component | Weight | Score Contribution |
|---|---|---|
| Annual Air Quality | 40% | 93.7 |
| Unhealthy Days | 25% | 83.6 |
| 5-Year Trend | 20% | 56.5 |
| Seasonal Variability | 10% | 80.4 |
| Extreme Events | 5% | 100 |
Explore More Air Quality Data
Frequently Asked Questions
About This Data
Data Sources
Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.
Methodology
Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:
- Annual PM2.5 averages (40%)
- Frequency of unhealthy days (25%)
- 5-year pollution trends (20%)
- Seasonal variability and extreme events (15%)
Updates & Accuracy
Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.
Practical Advice
When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.
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Missoula Air Quality FAQs
Is Missoula a good fit for people who care about long-term air quality?
Missoula holds a Clean Air Score of 81.4 and an air quality grade of B. The long-term annual PM2.5 average is 5.4, which provides a baseline for evaluating the local environment.
What is the frequency of unhealthy air or long-term pollution exposure in Missoula?
In Missoula, 0.8% of days have reached unhealthy levels for sensitive groups according to recent data. This frequency contributes to the city's overall grade of B and its annual PM2.5 mean of 5.4.
Is the air quality in Missoula improving or getting worse over time?
Recent data indicates that the air quality trend in Missoula is improving over recent years.
Does air quality vary by neighborhood in Missoula?
Air quality can vary significantly between different parts of Missoula; please refer to neighborhood or ZIP-level detail for localized information.