Air quality in Longmont
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
8.1 µg/m³
WHO guideline 15
PM10
8.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
3:00 AM
💨
PM2.5 8.1 µg/m³
34Good
4:00 AM
💨
PM2.5 7.1 µg/m³
30Good
5:00 AM
💨
PM2.5 6.8 µg/m³
28Good
6:00 AM
💨
PM2.5 6.5 µg/m³
27Good
7:00 AM
💨
PM2.5 6.2 µg/m³
26Good
8:00 AM
💨
PM2.5 6.1 µg/m³
26Good
9:00 AM
💨
PM2.5 4.9 µg/m³
32Good
10:00 AM
💨
PM2.5 5 µg/m³
41Good
11:00 AM
💨
PM2.5 5.4 µg/m³
50Good
12:00 PM
💨
PM2.5 5.5 µg/m³
78Moderate
1:00 PM
💨
PM2.5 5.4 µg/m³
90Moderate
2:00 PM
💨
PM2.5 5.3 µg/m³
93Moderate
Next few days
daily max · US EPA AQI
Thu
💨
Moderate · UV Very high
100
Fri
💨
Moderate · UV Very high
68
Sat
💨
Moderate · UV Very high
55
Sun
💨
Moderate · UV High
53