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Air quality · United States

Massachusetts Air Quality (AQI) Now

57 Moderate
European Air Quality Index
PM2.5
18.3µg/m³WHO limit 15
PM10
18.3µg/m³WHO limit 45
NO₂
54.3µg/m³
O₃
14µg/m³
Desert dust
0µg/m³
UV index
0.0
US AQI
40

Updated: · Source: Copernicus CAMS · Open-Meteo

Air quality in Massachusetts is moderate right now: European Air Quality Index 57. Fine particulate matter (PM2.5) is 18.3 µg/m³, 1.2 times the WHO 24-hour guideline. People with asthma, heart or lung conditions should reduce strenuous outdoor activity. Pollution is expected to peak around 20:00 over the next 48 hours (index 36, fair).

Massachusetts 48-hour air quality forecast

16:00: 2816:0017:00: 3018:00: 3219:00: 3520:00: 3621:00: 3622:00: 3422:0023:00: 3200:00: 2701:00: 2102:00: 1803:00: 1804:00: 1904:0005:00: 2006:00: 2007:00: 2008:00: 2009:00: 2110:00: 2110:0011:00: 2212:00: 2313:00: 2414:00: 2515:00: 2616:00: 2716:0017:00: 2718:00: 2619:00: 2520:00: 2421:00: 2322:00: 2222:0023:00: 21

Air quality across Massachusetts

Cleanest to most polluted.

Frequently asked questions

Is Massachusetts polluted today?
Air quality in Massachusetts is moderate right now: European Air Quality Index 57. People with asthma, heart or lung conditions should reduce strenuous outdoor activity.
Is it safe to exercise outdoors in Massachusetts today?
For most people yes; with air quality moderate, people with asthma or heart and lung conditions should ease off intense exercise.
How is the air quality index calculated?
The European Air Quality Index is set by the worst of PM2.5, PM10, nitrogen dioxide, ozone and sulphur dioxide: 0–20 good, 20–40 fair, 40–60 moderate, 60–80 poor, 80–100 very poor, above 100 extremely poor.

Values are Copernicus Atmosphere Monitoring Service (CAMS) model forecasts and may differ from local monitoring stations.

Massachusetts air quality: details

Pollutants and recent days

Nitrogen dioxide (NO₂) is 54.3 µg/m³ and ozone (O₃) 14 µg/m³; WHO guideline values are 25 (24 h) and 100 µg/m³ (8 h).