Air quality in South 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
13.7 µg/m³
WHO guideline 15
PM10
21.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
11:00 PM
💨
PM2.5 13.7 µg/m³
54Moderate
12:00 AM
💨
PM2.5 13.9 µg/m³
55Moderate
1:00 AM
💨
PM2.5 13.7 µg/m³
54Moderate
2:00 AM
💨
PM2.5 13 µg/m³
53Moderate
3:00 AM
💨
PM2.5 11.9 µg/m³
50Good
4:00 AM
💨
PM2.5 11 µg/m³
46Good
5:00 AM
💨
PM2.5 10.7 µg/m³
45Good
6:00 AM
💨
PM2.5 11.1 µg/m³
46Good
7:00 AM
💨
PM2.5 11.5 µg/m³
48Good
8:00 AM
💨
PM2.5 11.8 µg/m³
49Good
9:00 AM
💨
PM2.5 12.6 µg/m³
52Moderate
10:00 AM
💨
PM2.5 12.5 µg/m³
52Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV High
54
Tue
💨
Moderate · UV High
56
Wed
💨
Moderate · UV High
52
Thu
💨
Moderate · UV Moderate
51
Fri
💨
Moderate · UV High
53