Air quality in Katy
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
12.7 µg/m³
WHO guideline 15
PM10
21.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 PM
💨
PM2.5 12.7 µg/m³
52Moderate
6:00 PM
💨
PM2.5 13.2 µg/m³
53Moderate
7:00 PM
💨
PM2.5 13.4 µg/m³
54Moderate
8:00 PM
💨
PM2.5 13 µg/m³
53Moderate
9:00 PM
💨
PM2.5 12.3 µg/m³
51Moderate
10:00 PM
💨
PM2.5 11 µg/m³
46Good
11:00 PM
💨
PM2.5 10.2 µg/m³
43Good
12:00 AM
💨
PM2.5 10 µg/m³
42Good
1:00 AM
💨
PM2.5 9.9 µg/m³
41Good
2:00 AM
💨
PM2.5 9.8 µg/m³
41Good
3:00 AM
💨
PM2.5 9.9 µg/m³
41Good
4:00 AM
💨
PM2.5 10 µg/m³
42Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV Very high
56
Sun
💨
Moderate · UV Very high
55
Mon
💨
Good · UV Very high
48
Tue
💨
Good · UV Very high
40
Wed
💨
Good · UV Very high
34