Air quality in Ashburn
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
9.7 µg/m³
WHO guideline 15
PM10
9.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 AM
💨
PM2.5 9.7 µg/m³
40Good
3:00 AM
💨
PM2.5 8.7 µg/m³
36Good
4:00 AM
💨
PM2.5 7.8 µg/m³
33Good
5:00 AM
💨
PM2.5 7 µg/m³
29Good
6:00 AM
💨
PM2.5 6.8 µg/m³
28Good
7:00 AM
💨
PM2.5 7.1 µg/m³
30Good
8:00 AM
💨
PM2.5 7.6 µg/m³
32Good
9:00 AM
💨
PM2.5 8.3 µg/m³
35Good
10:00 AM
💨
PM2.5 8.2 µg/m³
34Good
11:00 AM
💨
PM2.5 8 µg/m³
33Good
12:00 PM
💨
PM2.5 7.7 µg/m³
36Good
1:00 PM
💨
PM2.5 7.1 µg/m³
38Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV High
57
Mon
💨
Moderate · UV High
87
Tue
💨
Moderate · UV High
95
Wed
💨
Moderate · UV High
99