Air quality in Ballwin
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
3.1 µg/m³
WHO guideline 15
PM10
3.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 3.1 µg/m³
21Good
5:00 AM
💨
PM2.5 3 µg/m³
20Good
6:00 AM
💨
PM2.5 3.1 µg/m³
18Good
7:00 AM
💨
PM2.5 3.7 µg/m³
19Good
8:00 AM
💨
PM2.5 4.3 µg/m³
24Good
9:00 AM
💨
PM2.5 4.4 µg/m³
31Good
10:00 AM
💨
PM2.5 5.5 µg/m³
37Good
11:00 AM
💨
PM2.5 6.4 µg/m³
42Good
12:00 PM
💨
PM2.5 7 µg/m³
46Good
1:00 PM
💨
PM2.5 7.3 µg/m³
49Good
2:00 PM
💨
PM2.5 7.2 µg/m³
50Good
3:00 PM
💨
PM2.5 7 µg/m³
51Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
51
Tue
💨
Unhealthy for Sensitive Groups · UV Very high
140
Wed
💨
Unhealthy for Sensitive Groups · UV Very high
136
Thu
💨
Unhealthy for Sensitive Groups · UV Moderate
106
Fri
💨
Good · UV Moderate
43