Seattle vs Chicago

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

United States
Seattle
51
Moderate
United States
Chicago
61
Moderate
MetricSeattleChicago
AQI5161
PM2.511.5 μg/m³4.1 μg/m³
PM1013.3 μg/m³4.2 μg/m³
Ozone87 ppb107 ppb
NO212.1 ppb6.1 ppb

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