1. North America
  2. United States
  3. California
  4. San Mateo County

San Mateo County

California

2026-03-13 03:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
60
NO2
μg/m³
22.6
PM2.5
μg/m³
3.1
CO
μg/m³
375
Weather
  • ℃
  • ℉
12℃
78%
11 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • NO2
  • PM2.5
  • CO
Places included
Atherton
AQI 2
Belmont
AQI 2
Brisbane
AQI 12
Broadmoor
AQI 12
Burlingame
AQI 2
Colma
AQI 12
Daly City
AQI 12
East Palo Alto
AQI 2
El Granada
AQI 2
Emerald Hills
AQI 2
Foster City
AQI 2
Half Moon Bay
AQI 2
Highlands-Baywood Park
AQI 2
Hillsborough
AQI 2
La Honda
AQI 2
Menlo Park
AQI 2
Millbrae
AQI 12
Montara
AQI 12
Moss Beach
AQI 2
North Fair Oaks
AQI 2
Pacifica
AQI 12
Pescadero
AQI 2
Portola Valley
AQI 2
Redwood City
AQI 19
San Bruno
AQI 12
San Carlos
AQI 2
San Mateo
AQI 2
South San Francisco
AQI 12
West Menlo Park
AQI 2
Woodside
AQI 2
Data Sources
http://www.airnow.gov/

Get the App

Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.

iPhone, iPad

Android

Cities Nearby

Half Moon Bay
AQI 2
El Granada
AQI 2
Highlands-Baywood Park
AQI 2
Emerald Hills
AQI 2
Woodside
AQI 2
Moss Beach
AQI 2
Belmont
AQI 2
San Carlos
AQI 2
Redwood City
AQI 19
Portola Valley
AQI 2
Hillsborough
AQI 2