San Antonio vs Chicago

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

United States
San Antonio
40
Good
United States
Chicago
40
Good
MetricSan AntonioChicago
AQI4040
PM2.53.1 μg/m³10.8 μg/m³
PM103.8 μg/m³11.7 μg/m³
Ozone86 ppb66 ppb
NO23.5 ppb13.1 ppb

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