AddAir quality in San Mateo
Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo • 40 Followers • 01:00, Jul 09 Local time
52*
US AQI⁺Moderate
Main pollutant:
PM2.5
9.8 µg/m³
12°
2 km/h
72 %
Hourly forecast
San Mateo air quality index (AQI⁺) forecast
Daily forecast
San Mateo air quality index (AQI⁺) forecast
| Today | 56 |  | 16° 11° |  17 km/h | 63% |
| Fri | 61 |  | 18° 9° | 21 km/h | 58% |
| Sat | 57 | | 18° 9° | 20 km/h | 47% |
Air pollutants
What is the current air quality in San Mateo?
PM2.5 concentration is currently 2 times the World Health Organization annual PM2.5 guideline value.
Health recommendations
 Sensitive groups should reduce outdoor exercise |
 Close your windows to avoid dirty outdoor air Get a monitor |
 Sensitive groups should wear a mask outdoors Get a mask |
 Sensitive groups should run an air purifier Get an air purifier |
Health recommendations
Sensitive groups should reduce outdoor exercise |
Close your windows to avoid dirty outdoor air Get a monitor |
Sensitive groups should wear a mask outdoors Get a mask |
Sensitive groups should run an air purifier Get an air purifier |
Most polluted locations near San Mateo
Worldwide AQI⁺ ranking
Historic air quality near San Mateo
History
Historic air quality graph for San Mateo
Historic air quality near San Mateo
History
Historic air quality graph for San Mateo
Most polluted locations near San Mateo
Worldwide AQI⁺ ranking
