Air quality in Saint Charles
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
7.5 µg/m³
WHO guideline 15
PM10
8 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
4:00 PM
💨
PM2.5 7.5 µg/m³
66 Moderate
5:00 PM
💨
PM2.5 7 µg/m³
60 Moderate
6:00 PM
💨
PM2.5 6.8 µg/m³
55 Moderate
7:00 PM
💨
PM2.5 6.8 µg/m³
50 Good
8:00 PM
💨
PM2.5 7.1 µg/m³
47 Good
9:00 PM
💨
PM2.5 7.2 µg/m³
41 Good
10:00 PM
💨
PM2.5 5.9 µg/m³
33 Good
11:00 PM
💨
PM2.5 3.9 µg/m³
27 Good
12:00 AM
💨
PM2.5 3.2 µg/m³
25 Good
1:00 AM
💨
PM2.5 3.8 µg/m³
25 Good
2:00 AM
💨
PM2.5 3.4 µg/m³
24 Good
3:00 AM
💨
PM2.5 2.9 µg/m³
23 Good
Next few days daily max · US EPA AQI
Fri
💨
Moderate · UV Moderate
71
Sat
💨
Good · UV Moderate
34
Sun
💨
Good · UV Moderate
40
Mon
💨
Moderate · UV Moderate
68
Tue
💨
Moderate · UV Moderate
81
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain