San Francisco vs Chicago

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

United States
San Francisco
47
Good
United States
Chicago
29
Good
MetricSan FranciscoChicago
AQI4729
PM2.511.1 μg/m³3.8 μg/m³
PM1016.5 μg/m³3.9 μg/m³
Ozone58 ppb63 ppb
NO28.4 ppb12.8 ppb

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

San Francisco vs Chicago - Air Quality Comparison | atmos.today