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  4. San Mateo County

San Mateo County

California

2025-12-13 17:00
AQI (India)
Good
Pollutants|Pollens
NO2
μg/m³
21.4
CO
μg/m³
500
PM2.5
μg/m³
9.4
O3
μg/m³
2.1
Weather
  • ℃
  • ℉
10℃
86%
4 kph
1 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (India)
  • Pollen
  • NO2
  • CO
  • PM2.5
  • O3
Places included
Atherton
AQI 17
Belmont
AQI 17
Brisbane
AQI 14
Broadmoor
AQI 14
Burlingame
AQI 17
Colma
AQI 14
Daly City
AQI 14
East Palo Alto
AQI 17
El Granada
AQI 17
Emerald Hills
AQI 17
Foster City
AQI 17
Half Moon Bay
AQI 17
Highlands-Baywood Park
AQI 17
Hillsborough
AQI 17
La Honda
AQI 17
Menlo Park
AQI 17
Millbrae
AQI 14
Montara
AQI 14
Moss Beach
AQI 17
North Fair Oaks
AQI 17
Pacifica
AQI 14
Pescadero
AQI 17
Portola Valley
AQI 17
Redwood City
AQI 27
San Bruno
AQI 14
San Carlos
AQI 17
San Mateo
AQI 17
South San Francisco
AQI 14
West Menlo Park
AQI 17
Woodside
AQI 17
Data Sources
http://www.airnow.gov/

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Cities Nearby

Half Moon Bay
AQI 17
El Granada
AQI 17
Highlands-Baywood Park
AQI 17
Emerald Hills
AQI 17
Woodside
AQI 17
Moss Beach
AQI 17
Belmont
AQI 17
San Carlos
AQI 17
Redwood City
AQI 27
Portola Valley
AQI 17
Hillsborough
AQI 17