Boston vs Chicago

Live air quality comparison. Boston has cleaner air right now.

United States
Boston
47
Good
United States
Chicago
58
Moderate
MetricBostonChicago
AQI4758
PM2.57.6 μg/m³15 μg/m³
PM107.7 μg/m³15.3 μg/m³
Ozone28 ppb32 ppb
NO242.3 ppb42.2 ppb

Lower values mean cleaner air. Updated hourly. Sources: OpenAQ, Open-Meteo.