Boston vs Chicago

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

United States
Boston
65
Moderate
United States
Chicago
61
Moderate
MetricBostonChicago
AQI6561
PM2.518.5 μg/m³14.2 μg/m³
PM1021.8 μg/m³14.5 μg/m³
Ozone125 ppb86 ppb
NO25.7 ppb25.8 ppb

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