San Francisco
 
Data courtesy of:
 

AQI Forecast - http://www.epa.gov/airnow/today/forecast_aqi_20141127_sanfrancisco_ca.jpg
 
Legend: National Parks/Monuments National Parks/Monuments
 - http://www.epa.gov/airnow/today/cur_aqi_sanfrancisco_ca.jpg
 
Legend: National Parks/Monuments National Parks/Monuments
AQI Animation - http://www.epa.gov/airnow/today/anim_aqi_sanfrancisco_ca.gif
 
Legend: National Parks/Monuments National Parks/Monuments
 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
Local Air Quality Resources
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State Air Quality Resources
EnviroFlash
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
91 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
Moderate Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5)
91 
Moderate
Particles (PM2.5)
Moderate
Moderate

Current Conditions
Air Quality Index (AQI)
observed at 9:00 PST
84
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 84 Moderate
Ozone 4 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)

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