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  3. California
  4. San Mateo County

San Mateo County

California

2026-03-13 03:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
60
PM2.5
μg/m³
3.1
NO2
μg/m³
22.6
CO
μg/m³
375
Weather
  • ℃
  • ℉
12℃
78%
11 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • NO2
  • CO
Places included
Atherton
AQI 6
Belmont
AQI 6
Brisbane
AQI 45
Broadmoor
AQI 45
Burlingame
AQI 6
Colma
AQI 45
Daly City
AQI 45
East Palo Alto
AQI 6
El Granada
AQI 6
Emerald Hills
AQI 6
Foster City
AQI 6
Half Moon Bay
AQI 6
Highlands-Baywood Park
AQI 6
Hillsborough
AQI 6
La Honda
AQI 6
Menlo Park
AQI 6
Millbrae
AQI 45
Montara
AQI 45
Moss Beach
AQI 6
North Fair Oaks
AQI 6
Pacifica
AQI 45
Pescadero
AQI 6
Portola Valley
AQI 6
Redwood City
AQI 26
San Bruno
AQI 45
San Carlos
AQI 6
San Mateo
AQI 6
South San Francisco
AQI 45
West Menlo Park
AQI 6
Woodside
AQI 6
Data Sources
http://www.airnow.gov/

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Cities Nearby

Half Moon Bay
AQI 6
El Granada
AQI 6
Highlands-Baywood Park
AQI 6
Emerald Hills
AQI 6
Woodside
AQI 6
Moss Beach
AQI 6
Belmont
AQI 6
San Carlos
AQI 6
Redwood City
AQI 26
Portola Valley
AQI 6
Hillsborough
AQI 6