Air quality in California
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
12.3 µg/m³
WHO guideline 15
PM10
13 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 AM
💨
PM2.5 12.3 µg/m³
51Moderate
2:00 AM
💨
PM2.5 12.7 µg/m³
52Moderate
3:00 AM
💨
PM2.5 13.5 µg/m³
54Moderate
4:00 AM
💨
PM2.5 14.3 µg/m³
56Moderate
5:00 AM
💨
PM2.5 15.3 µg/m³
58Moderate
6:00 AM
💨
PM2.5 16.4 µg/m³
60Moderate
7:00 AM
💨
PM2.5 17.6 µg/m³
63Moderate
8:00 AM
💨
PM2.5 18.3 µg/m³
64Moderate
9:00 AM
💨
PM2.5 17.1 µg/m³
62Moderate
10:00 AM
💨
PM2.5 15.3 µg/m³
58Moderate
11:00 AM
💨
PM2.5 13.7 µg/m³
54Moderate
12:00 PM
💨
PM2.5 12.4 µg/m³
61Moderate
Next few days
daily max · US EPA AQI
Fri
💨
Moderate · UV Very high
68
Sat
💨
Moderate · UV Very high
55
Sun
💨
Good · UV Very high
48
Mon
💨
Good · UV Very high
45
Tue
💨
Good · UV Very high
41