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
4.4 µg/m³
WHO guideline 15
PM10
4.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 AM
💨
PM2.5 4.4 µg/m³
20Good
7:00 AM
💨
PM2.5 4 µg/m³
25Good
8:00 AM
💨
PM2.5 3.6 µg/m³
30Good
9:00 AM
💨
PM2.5 3.1 µg/m³
36Good
10:00 AM
💨
PM2.5 2.9 µg/m³
43Good
11:00 AM
💨
PM2.5 3.3 µg/m³
51Moderate
12:00 PM
💨
PM2.5 3.7 µg/m³
71Moderate
1:00 PM
💨
PM2.5 3.6 µg/m³
80Moderate
2:00 PM
💨
PM2.5 3.9 µg/m³
81Moderate
3:00 PM
💨
PM2.5 4.6 µg/m³
81Moderate
4:00 PM
💨
PM2.5 4.9 µg/m³
83Moderate
5:00 PM
💨
PM2.5 5.3 µg/m³
83Moderate
Next few days
daily max · US EPA AQI
Tue
💨
Moderate · UV Very high
83
Wed
💨
Good · UV Very high
49
Thu
💨
Moderate · UV Very high
83
Fri
💨
Moderate · UV Very high
68
Sat
💨
Good · UV Very high
23