Seattle vs Chicago

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

United States
Seattle
39
Good
United States
Chicago
61
Moderate
MetricSeattleChicago
AQI3961
PM2.57.5 μg/m³14.2 μg/m³
PM107.7 μg/m³14.5 μg/m³
Ozone61 ppb86 ppb
NO217.6 ppb25.8 ppb

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