Air quality in San Mateo
67
Poor
Air Quality Index
Everyone may begin to experience health effects. Sensitive groups may experience more serious effects.
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Pollutants
PM2.5
23.2 µg/m³
PM10
24 µg/m³
NO₂
3.9 µg/m³
O₃
170 µg/m³
SO₂
16.7 µg/m³
CO
449 µg/m³