San Diego vs Chicago

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

United States
San Diego
61
Moderate
United States
Chicago
61
Moderate
MetricSan DiegoChicago
AQI6161
PM2.517.6 μg/m³5.2 μg/m³
PM1025.3 μg/m³5.2 μg/m³
Ozone88 ppb104 ppb
NO27.8 ppb8.1 ppb

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