Massachusetts Air Quality

Real-time AQI data and air quality trends for 125 cities across Massachusetts.

Statewide Air Quality Overview

40
Average AQI
2466
Good Air Days
641
Moderate Days
Unhealthy Days
151
Highest AQI

Based on 2025 EPA data

Cleanest Air in Massachusetts

1. Vineyard HavenMedian AQI: 37
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2. Oak BluffsMedian AQI: 37
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3. Monument BeachMedian AQI: 38
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4. South DennisMedian AQI: 38
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5. North EasthamMedian AQI: 38
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Most Polluted in Massachusetts

1. Middleborough CenterMedian AQI: 40
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2. West WarehamMedian AQI: 40
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3. The PinehillsMedian AQI: 40
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4. North ScituateMedian AQI: 40
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5. Green HarborMedian AQI: 40
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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 Massachusetts.
National Rankings
Compare Massachusetts cities to the rest of the US by air quality grade and median AQI.

All Cities in Massachusetts

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