San Antonio vs Chicago

Live air quality comparison. San Antonio has cleaner air right now.

United States
San Antonio
21
Good
United States
Chicago
29
Good
MetricSan AntonioChicago
AQI2129
PM2.59.5 μg/m³2.5 μg/m³
PM109.7 μg/m³2.5 μg/m³
Ozone29 ppb59 ppb
NO214.5 ppb12.9 ppb

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