San Francisco vs Beijing

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

United States
San Francisco
40
Good
China
Beijing
184
Unhealthy
MetricSan FranciscoBeijing
AQI40184
PM2.57.5 μg/m³156.9 μg/m³
PM1011.3 μg/m³163 μg/m³
Ozone83 ppb6 ppb
NO24.3 ppb45 ppb

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