Air quality in Yreka
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
4.7 µg/m³
WHO guideline 15
PM10
5.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 PM
💨
PM2.5 4.7 µg/m³
44Good
11:00 PM
💨
PM2.5 4.8 µg/m³
41Good
12:00 AM
💨
PM2.5 5 µg/m³
37Good
1:00 AM
💨
PM2.5 5.3 µg/m³
34Good
2:00 AM
💨
PM2.5 5.6 µg/m³
33Good
3:00 AM
💨
PM2.5 5.8 µg/m³
32Good
4:00 AM
💨
PM2.5 6 µg/m³
31Good
5:00 AM
💨
PM2.5 6.2 µg/m³
32Good
6:00 AM
💨
PM2.5 6.4 µg/m³
34Good
7:00 AM
💨
PM2.5 6.6 µg/m³
36Good
8:00 AM
💨
PM2.5 6.6 µg/m³
40Good
9:00 AM
💨
PM2.5 6.2 µg/m³
46Good
Next few days
daily max · US EPA AQI
Tue
💨
Moderate · UV Very high
70
Wed
💨
Moderate · UV Very high
95
Thu
💨
Moderate · UV Very high
96
Fri
💨
Unhealthy for Sensitive Groups · UV High
115
Sat
💨
Good · UV Very high
33