Air quality in Shasta
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
9 µg/m³
WHO guideline 15
PM10
12.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 AM
💨
PM2.5 9 µg/m³
38Good
2:00 AM
💨
PM2.5 9.5 µg/m³
40Good
3:00 AM
💨
PM2.5 10.6 µg/m³
44Good
4:00 AM
💨
PM2.5 11.8 µg/m³
49Good
5:00 AM
💨
PM2.5 13.1 µg/m³
53Moderate
6:00 AM
💨
PM2.5 14.2 µg/m³
55Moderate
7:00 AM
💨
PM2.5 15.3 µg/m³
58Moderate
8:00 AM
💨
PM2.5 15.7 µg/m³
59Moderate
9:00 AM
💨
PM2.5 14 µg/m³
55Moderate
10:00 AM
💨
PM2.5 10.4 µg/m³
45Good
11:00 AM
💨
PM2.5 8.4 µg/m³
70Moderate
12:00 PM
💨
PM2.5 8.6 µg/m³
83Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
60
Tue
💨
Moderate · UV Very high
90
Wed
💨
Unhealthy for Sensitive Groups · UV Very high
106
Thu
💨
Moderate · UV Very high
100
Fri
💨
Moderate · UV High
60