Montana Air Quality

Real-time AQI data and air quality trends for 495 cities across Montana.

Statewide Air Quality Overview

23
Average AQI
2961
Good Air Days
385
Moderate Days
Unhealthy Days
168
Highest AQI

Based on 2025 EPA data

Cleanest Air in Montana

1. PolsonMedian AQI: 4
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2. RavalliMedian AQI: 4
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3. Bear DanceMedian AQI: 4
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4. AshlandMedian AQI: 4
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5. DaytonMedian AQI: 4
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Most Polluted in Montana

1. WisdomMedian AQI: 12
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2. JacksonMedian AQI: 12
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3. Maverick MountainMedian AQI: 12
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4. Wise RiverMedian AQI: 12
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5. GrantMedian AQI: 12
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Learn About Air Quality

What Is the AQI?
Understand how the Air Quality Index is calculated and what each level means for your health.
Pollutant Guide
Learn about PM2.5, ozone, and other pollutants that affect air quality across Montana.
National Rankings
Compare Montana cities to the rest of the US by air quality grade and median AQI.

All Cities in Montana

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