9th St. and Brannan St. (BC)
Monitoring Station
· San Francisco, United States
13
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
12
6pm
13
8
8
9pm
8
8
8
12am
8
8
8
3am
8
8
8
6am
20
—
—
9am
—
—
—
12pm
—
—
—
3pm
—
—
Station readings
12
13
CAMS model
adj -17
25
25
25
25
25
25
25
25
25
25
25
25
25
37
Air Quality Trend (24h)
PM2.53.1 µg/m³
✓ WHO
Good
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Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T21:24 UTC.