Air quality in Boulder
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
6.5 µg/m³
WHO guideline 15
PM10
6.6 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
9:00 AM
💨
PM2.5 6.5 µg/m³
27 Good
10:00 AM
💨
PM2.5 4.7 µg/m³
26 Good
11:00 AM
💨
PM2.5 3.7 µg/m³
35 Good
12:00 PM
💨
PM2.5 3.4 µg/m³
43 Good
1:00 PM
💨
PM2.5 3.6 µg/m³
47 Good
2:00 PM
💨
PM2.5 3.8 µg/m³
49 Good
3:00 PM
💨
PM2.5 4 µg/m³
49 Good
4:00 PM
💨
PM2.5 4 µg/m³
47 Good
5:00 PM
💨
PM2.5 4.4 µg/m³
44 Good
6:00 PM
💨
PM2.5 5.7 µg/m³
39 Good
7:00 PM
💨
PM2.5 8 µg/m³
33 Good
8:00 PM
💨
PM2.5 9.6 µg/m³
40 Good
Next few days daily max · US EPA AQI
Tue
💨
Moderate · UV Moderate
61
Wed
💨
Moderate · UV Moderate
65
Fri
💨
Moderate · UV Moderate
71
Sat
💨
Good · UV Moderate
36
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain