Philadelphia vs Chicago

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

United States
Philadelphia
49
Good
United States
Chicago
40
Good
MetricPhiladelphiaChicago
AQI4940
PM2.520.8 μg/m³10.8 μg/m³
PM1021.5 μg/m³11.7 μg/m³
Ozone37 ppb66 ppb
NO228.9 ppb13.1 ppb

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