San Francisco vs Beijing

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

United States
San Francisco
51
Moderate
China
Beijing
190
Unhealthy
MetricSan FranciscoBeijing
AQI51190
PM2.59.6 μg/m³85.2 μg/m³
PM1014.8 μg/m³90.1 μg/m³
Ozone67 ppb0 ppb
NO27 ppb105.3 ppb

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