Seattle vs Chicago

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

United States
Seattle
52
Moderate
United States
Chicago
40
Good
MetricSeattleChicago
AQI5240
PM2.511 μg/m³10.8 μg/m³
PM1013.6 μg/m³11.7 μg/m³
Ozone41 ppb66 ppb
NO224.1 ppb13.1 ppb

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