Air quality in St. Louis
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
7.1 µg/m³
WHO guideline 15
PM10
8.1 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
6:00 PM
💨
PM2.5 7.1 µg/m³
42 Good
7:00 PM
💨
PM2.5 8 µg/m³
36 Good
8:00 PM
💨
PM2.5 8.3 µg/m³
35 Good
9:00 PM
💨
PM2.5 8 µg/m³
33 Good
10:00 PM
💨
PM2.5 7.3 µg/m³
31 Good
11:00 PM
💨
PM2.5 6.4 µg/m³
32 Good
12:00 AM
💨
PM2.5 5.9 µg/m³
33 Good
1:00 AM
💨
PM2.5 5.6 µg/m³
34 Good
2:00 AM
💨
PM2.5 5.6 µg/m³
34 Good
3:00 AM
💨
PM2.5 5.8 µg/m³
32 Good
4:00 AM
💨
PM2.5 6.2 µg/m³
30 Good
5:00 AM
💨
PM2.5 6.5 µg/m³
28 Good
Next few days daily max · US EPA AQI
Mon
💨
Moderate · UV Moderate
93
Tue
💨
Moderate · UV Moderate
75
Wed
💨
Moderate · UV Low
53
Thu
💨
Good · UV Moderate
48
Fri
💨
Good · UV Moderate
31
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain