Air quality in Westminster
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
8.8 µg/m³
WHO guideline 15
PM10
11.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 PM
💨
PM2.5 8.8 µg/m³
37Good
11:00 PM
💨
PM2.5 8.9 µg/m³
37Good
12:00 AM
💨
PM2.5 8.9 µg/m³
37Good
1:00 AM
💨
PM2.5 8.8 µg/m³
37Good
2:00 AM
💨
PM2.5 9 µg/m³
38Good
3:00 AM
💨
PM2.5 9.6 µg/m³
40Good
4:00 AM
💨
PM2.5 10.3 µg/m³
43Good
5:00 AM
💨
PM2.5 10.7 µg/m³
45Good
6:00 AM
💨
PM2.5 11.1 µg/m³
46Good
7:00 AM
💨
PM2.5 11.3 µg/m³
47Good
8:00 AM
💨
PM2.5 11.4 µg/m³
48Good
9:00 AM
💨
PM2.5 11.8 µg/m³
49Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV Very high
51
Mon
💨
Moderate · UV Very high
52
Tue
💨
Moderate · UV Very high
51
Wed
💨
Moderate · UV Very high
53
Thu
💨
Good · UV Very high
48