South Dakota Air Quality

Real-time AQI data and air quality trends for 482 cities across South Dakota.

Statewide Air Quality Overview

36
Average AQI
1443
Good Air Days
340
Moderate Days
Unhealthy Days
154
Highest AQI

Based on 2025 EPA data

Cleanest Air in South Dakota

1. HarroldMedian AQI: 14
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2. PierreMedian AQI: 14
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3. BluntMedian AQI: 14
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4. Oahe AcresMedian AQI: 14
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5. WestportMedian AQI: 25
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Most Polluted in South Dakota

1. Meadow View AdditionMedian AQI: 36
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2. Valley SpringsMedian AQI: 36
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3. GarretsonMedian AQI: 36
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4. Sioux FallsMedian AQI: 36
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5. BalticMedian AQI: 36
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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 South Dakota.
National Rankings
Compare South Dakota cities to the rest of the US by air quality grade and median AQI.

All Cities in South Dakota

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