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  4. San Mateo County

San Mateo County

California

2025-12-15 01:00
AQI (China)
Excellent
Pollutants|Pollens
PM2.5
μg/m³
11.5
NO2
μg/m³
26.1
CO
μg/m³
500
O3
μg/m³
12.9
Weather
  • ℃
  • ℉
8℃
93%
7 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM2.5
  • NO2
  • CO
  • O3
Places included
Atherton
AQI 19
Belmont
AQI 19
Brisbane
AQI 12
Broadmoor
AQI 12
Burlingame
AQI 19
Colma
AQI 12
Daly City
AQI 12
East Palo Alto
AQI 19
El Granada
AQI 19
Emerald Hills
AQI 19
Foster City
AQI 19
Half Moon Bay
AQI 19
Highlands-Baywood Park
AQI 19
Hillsborough
AQI 19
La Honda
AQI 19
Menlo Park
AQI 19
Millbrae
AQI 12
Montara
AQI 12
Moss Beach
AQI 19
North Fair Oaks
AQI 19
Pacifica
AQI 12
Pescadero
AQI 19
Portola Valley
AQI 19
Redwood City
AQI 19
San Bruno
AQI 12
San Carlos
AQI 19
San Mateo
AQI 19
South San Francisco
AQI 12
West Menlo Park
AQI 19
Woodside
AQI 19
Data Sources
http://www.airnow.gov/

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Cities Nearby

Half Moon Bay
AQI 19
El Granada
AQI 19
Highlands-Baywood Park
AQI 19
Emerald Hills
AQI 19
Woodside
AQI 19
Moss Beach
AQI 19
Belmont
AQI 19
San Carlos
AQI 19
Redwood City
AQI 19
Portola Valley
AQI 19
Hillsborough
AQI 19