Seattle vs Chicago

Live air quality comparison. Both cities show identical AQI right now.

United States
Seattle
58
Moderate
United States
Chicago
58
Moderate
MetricSeattleChicago
AQI5858
PM2.520.4 μg/m³15 μg/m³
PM1021.5 μg/m³15.3 μg/m³
Ozone37 ppb32 ppb
NO232.7 ppb42.2 ppb

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