Air quality in Williamson
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
1 µg/m³
WHO guideline 15
PM10
1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 PM
💨
PM2.5 1 µg/m³
41Good
10:00 PM
💨
PM2.5 0.9 µg/m³
39Good
11:00 PM
💨
PM2.5 0.8 µg/m³
38Good
12:00 AM
💨
PM2.5 1 µg/m³
37Good
1:00 AM
💨
PM2.5 1.5 µg/m³
37Good
2:00 AM
💨
PM2.5 2.2 µg/m³
37Good
3:00 AM
💨
PM2.5 3.3 µg/m³
38Good
4:00 AM
💨
PM2.5 5.5 µg/m³
40Good
5:00 AM
💨
PM2.5 7.9 µg/m³
40Good
6:00 AM
💨
PM2.5 10.4 µg/m³
43Good
7:00 AM
💨
PM2.5 10.1 µg/m³
42Good
8:00 AM
💨
PM2.5 9 µg/m³
38Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV High
55
Mon
💨
Moderate · UV High
68
Wed
💨
Moderate · UV High
53