Monitor the live Air Quality Index (AQI) in San Francisco County. See real-time pollution metrics including PM2.5, PM10, and health advisories for outdoor activities.
Air Quality Sensors Offline
We are currently unable to connect to the air quality monitoring stations for San Francisco County. Please check back later.
AQI Guidelines
- 0-50 (Good): Ideal air quality for outdoor activities.
- 51-100 (Moderate): Acceptable, but highly sensitive people should limit prolonged outdoor exertion.
- 101-150 (Unhealthy for Sensitive Groups): Children, older adults, and people with lung disease should reduce exposure.
- 151-200 (Unhealthy): Everyone may begin to experience health effects.
More San Francisco County Weather
Air Quality in San Francisco County - FAQ
Currently, the air quality sensors for San Francisco County are offline or undergoing maintenance.