San Diego vs Chicago

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

United States
San Diego
44
Good
United States
Chicago
58
Moderate
MetricSan DiegoChicago
AQI4458
PM2.55.5 μg/m³15 μg/m³
PM108.8 μg/m³15.3 μg/m³
Ozone81 ppb32 ppb
NO23.1 ppb42.2 ppb

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