Indiana Air Quality

Real-time AQI data and air quality trends for 974 cities across Indiana.

Statewide Air Quality Overview

42
Average AQI
6286
Good Air Days
2556
Moderate Days
Unhealthy Days
219
Highest AQI

Based on 2025 EPA data

Cleanest Air in Indiana

1. Smithville-SandersMedian AQI: 36
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2. StanfordMedian AQI: 36
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3. HarrodsburgMedian AQI: 36
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4. StinesvilleMedian AQI: 36
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5. EllettsvilleMedian AQI: 36
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Most Polluted in Indiana

1. KnightstownMedian AQI: 38
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2. ClaytonMedian AQI: 38
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3. PlainfieldMedian AQI: 38
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4. WestwoodMedian AQI: 38
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5. ChurubuscoMedian AQI: 38
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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 Indiana.
National Rankings
Compare Indiana cities to the rest of the US by air quality grade and median AQI.

All Cities in Indiana

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