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  4. San Mateo County

San Mateo County

California

2025-12-14 14:00
AQI (US)
Moderate
Pollutants|Pollens
PM2.5
μg/m³
18
NO2
μg/m³
27.3
CO
μg/m³
500
O3
μg/m³
0
Weather
  • ℃
  • ℉
7℃
94%
9 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • NO2
  • CO
  • O3
Places included
Atherton
AQI 73
Belmont
AQI 73
Brisbane
AQI 54
Broadmoor
AQI 54
Burlingame
AQI 73
Colma
AQI 54
Daly City
AQI 54
East Palo Alto
AQI 73
El Granada
AQI 73
Emerald Hills
AQI 73
Foster City
AQI 73
Half Moon Bay
AQI 73
Highlands-Baywood Park
AQI 73
Hillsborough
AQI 73
La Honda
AQI 73
Menlo Park
AQI 73
Millbrae
AQI 54
Montara
AQI 54
Moss Beach
AQI 73
North Fair Oaks
AQI 73
Pacifica
AQI 54
Pescadero
AQI 73
Portola Valley
AQI 73
Redwood City
AQI 73
San Bruno
AQI 54
San Carlos
AQI 73
San Mateo
AQI 73
South San Francisco
AQI 54
West Menlo Park
AQI 73
Woodside
AQI 73
Data Sources
http://www.airnow.gov/

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Cities Nearby

Half Moon Bay
AQI 73
El Granada
AQI 73
Highlands-Baywood Park
AQI 73
Emerald Hills
AQI 73
Woodside
AQI 73
Moss Beach
AQI 73
Belmont
AQI 73
San Carlos
AQI 73
Redwood City
AQI 73
Portola Valley
AQI 73
Hillsborough
AQI 73