Air quality in Centreville
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
4.9 µg/m³
WHO guideline 15
PM10
5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
3:00 AM
💨
PM2.5 4.9 µg/m³
43Good
4:00 AM
💨
PM2.5 5.6 µg/m³
41Good
5:00 AM
💨
PM2.5 6.5 µg/m³
39Good
6:00 AM
💨
PM2.5 7.3 µg/m³
34Good
7:00 AM
💨
PM2.5 8.2 µg/m³
34Good
8:00 AM
💨
PM2.5 9.1 µg/m³
38Good
9:00 AM
💨
PM2.5 11.2 µg/m³
47Good
10:00 AM
💨
PM2.5 13.5 µg/m³
88Moderate
11:00 AM
💨
PM2.5 14.8 µg/m³
142Unhealthy for Sensitive Groups
12:00 PM
💨
PM2.5 14.5 µg/m³
170Unhealthy
1:00 PM
💨
PM2.5 13.9 µg/m³
188Unhealthy
2:00 PM
💨
PM2.5 13.2 µg/m³
198Unhealthy
Next few days
daily max · US EPA AQI
Tue
💨
Unhealthy · UV High
198
Thu
💨
Unhealthy for Sensitive Groups · UV High
147
Fri
💨
Moderate · UV High
75