Air quality in San Francisco
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
11.9 µg/m³
WHO guideline 15
PM10
15.4 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
9:00 AM
💨
PM2.5 11.9 µg/m³
50 Good
10:00 AM
💨
PM2.5 11 µg/m³
46 Good
11:00 AM
💨
PM2.5 9.8 µg/m³
41 Good
12:00 PM
💨
PM2.5 9.4 µg/m³
39 Good
1:00 PM
💨
PM2.5 8.9 µg/m³
40 Good
2:00 PM
💨
PM2.5 9.3 µg/m³
40 Good
3:00 PM
💨
PM2.5 9.6 µg/m³
40 Good
4:00 PM
💨
PM2.5 9.6 µg/m³
40 Good
5:00 PM
💨
PM2.5 9.6 µg/m³
40 Good
6:00 PM
💨
PM2.5 9.6 µg/m³
40 Good
7:00 PM
💨
PM2.5 9 µg/m³
38 Good
8:00 PM
💨
PM2.5 9.3 µg/m³
39 Good
Next few days daily max · US EPA AQI
Thu
💨
Moderate · UV Low
76
Fri
💨
Moderate · UV Low
60
Sat
💨
Moderate · UV Low
57
Sun
💨
Moderate · UV Moderate
56
Mon
💨
Good · UV Moderate
47
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain