Air quality in Washington
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
5.6 µg/m³
WHO guideline 15
PM10
6.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 PM
💨
PM2.5 5.6 µg/m³
27Good
11:00 PM
💨
PM2.5 5.2 µg/m³
26Good
12:00 AM
💨
PM2.5 4.7 µg/m³
24Good
1:00 AM
💨
PM2.5 4.4 µg/m³
22Good
2:00 AM
💨
PM2.5 4.3 µg/m³
20Good
3:00 AM
💨
PM2.5 4.2 µg/m³
18Good
4:00 AM
💨
PM2.5 3.9 µg/m³
17Good
5:00 AM
💨
PM2.5 3.6 µg/m³
16Good
6:00 AM
💨
PM2.5 3.3 µg/m³
15Good
7:00 AM
💨
PM2.5 3.1 µg/m³
16Good
8:00 AM
💨
PM2.5 3.2 µg/m³
22Good
9:00 AM
💨
PM2.5 1.9 µg/m³
30Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV High
54
Mon
💨
Good · UV Very high
46
Tue
💨
Moderate · UV Very high
78
Wed
💨
Moderate · UV Very high
61
Thu
💨
Good · UV Moderate
30