Idaho Air Quality

Real-time AQI data and air quality trends for 236 cities across Idaho.

Statewide Air Quality Overview

30
Average AQI
2969
Good Air Days
557
Moderate Days
Unhealthy Days
111
Highest AQI

Based on 2025 EPA data

Cleanest Air in Idaho

1. StanleyMedian AQI: 3
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2. ClaytonMedian AQI: 3
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3. ChallisMedian AQI: 3
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4. Lost RiverMedian AQI: 3
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5. MackayMedian AQI: 3
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Most Polluted in Idaho

1. FilerMedian AQI: 24
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2. GeneseeMedian AQI: 24
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3. AtholMedian AQI: 24
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4. Post FallsMedian AQI: 24
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5. Dalton GardensMedian AQI: 24
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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 Idaho.
National Rankings
Compare Idaho cities to the rest of the US by air quality grade and median AQI.

All Cities in Idaho

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