UCSF Mount Zion Air Quality
Monitoring Station
· San Francisco, United States
23
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
20
12am
23
19
19
3am
19
19
19
6am
19
19
19
9am
19
19
19
12pm
19
0
—
3pm
—
—
—
6pm
—
—
—
9pm
—
—
Station readings
20
23
CAMS model
adj -35
54
54
54
54
54
54
54
54
54
54
54
54
54
54
34
Air Quality Forecast (24h)
PM2.55.4 µg/m³
✓ WHO
Good
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T03:40 UTC.