Seattle vs Chicago

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

United States
Seattle
63
Moderate
United States
Chicago
29
Good
MetricSeattleChicago
AQI6329
PM2.512.4 μg/m³2.5 μg/m³
PM1015.7 μg/m³2.5 μg/m³
Ozone41 ppb59 ppb
NO222.7 ppb12.9 ppb

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