Air quality in Saint Charles
22
Fair
Air Quality Index
Air quality is acceptable. Extremely sensitive people may experience minor symptoms.
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Pollutants
PM2.5
21.5 µg/m³
PM10
21.6 µg/m³
NO₂
43.9 µg/m³
O₃
10 µg/m³
SO₂
4.1 µg/m³
CO
183 µg/m³