Air quality in Downtown DC
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
7.7 µg/m³
WHO guideline 15
PM10
7.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 PM
💨
PM2.5 7.7 µg/m³
81Moderate
8:00 PM
💨
PM2.5 9.2 µg/m³
58Moderate
9:00 PM
💨
PM2.5 10 µg/m³
43Good
10:00 PM
💨
PM2.5 11.9 µg/m³
50Good
11:00 PM
💨
PM2.5 14.2 µg/m³
55Moderate
12:00 AM
💨
PM2.5 16.1 µg/m³
59Moderate
1:00 AM
💨
PM2.5 19.2 µg/m³
66Moderate
2:00 AM
💨
PM2.5 22.5 µg/m³
73Moderate
3:00 AM
💨
PM2.5 23.9 µg/m³
76Moderate
4:00 AM
💨
PM2.5 21.6 µg/m³
71Moderate
5:00 AM
💨
PM2.5 19.8 µg/m³
67Moderate
6:00 AM
💨
PM2.5 18.5 µg/m³
64Moderate
Next few days
daily max · US EPA AQI
Thu
💨
Unhealthy for Sensitive Groups · UV High
113
Fri
💨
Unhealthy · UV Moderate
153
Sat
💨
Unhealthy for Sensitive Groups · UV High
111
Sun
💨
Moderate · UV Very high
86
Mon
💨
Good · UV Very high
45