Air quality in San Mateo, CA

Live air quality report and air quality forecast in San Mateo

live
fair
45.0 AQI
fair
45.0 AQI

Main pollutants

40.0
PM2.5
24.0
PM10
45.0
NO2
15.0
O3
  • outdoor sports
  • bring baby out
  • eating outside
The air is moderately polluted. Greater than the maximum limit established for one year by WHO. A long-term exposure constitutes a health risk.

Live air quality report and air quality forecast in San Mateo

40.0
PM2.5
24.0
PM10
45.0
NO2
15.0
O3

Annual Average 21 AQI
Days per year at this level

Main pollutants

AQI

  • 40.0
    PM2.5
  • 24.0
    PM10
  • 45.0
    NO2
  • 15.0
    O3

µg/m³

  • 11
    PM2.5
  • 19
    PM10
  • 22
    NO2
  • 15.0
    O3

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