Air quality in Webster Groves
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
6 µg/m³
WHO guideline 15
PM10
6.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 6 µg/m³
25Good
5:00 AM
💨
PM2.5 5.9 µg/m³
25Good
6:00 AM
💨
PM2.5 6.4 µg/m³
27Good
7:00 AM
💨
PM2.5 6.6 µg/m³
28Good
8:00 AM
💨
PM2.5 6 µg/m³
25Good
9:00 AM
💨
PM2.5 4.9 µg/m³
32Good
10:00 AM
💨
PM2.5 5 µg/m³
38Good
11:00 AM
💨
PM2.5 5.2 µg/m³
43Good
12:00 PM
💨
PM2.5 6.2 µg/m³
48Good
1:00 PM
💨
PM2.5 6.1 µg/m³
51Moderate
2:00 PM
💨
PM2.5 5.9 µg/m³
58Moderate
3:00 PM
💨
PM2.5 5.7 µg/m³
60Moderate
Next few days
daily max · US EPA AQI
Thu
💨
Moderate · UV High
60
Fri
💨
Unhealthy for Sensitive Groups · UV High
126
Sat
💨
Moderate · UV Very high
78
Sun
💨
Unhealthy for Sensitive Groups · UV Moderate
104
Mon
💨
Moderate · UV High
69