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Air quality in San Mateo
Air quality index (AQI) and PM2.5 air pollution in San Mateo
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San Mateo Air Quality Map
Real-time San Mateo air pollution map
AIR QUALITY DATA SOURCE
* AQI modeled using satellite data Learn more
Weather
What is the current weather in San Mateo?
| Weather | Broken clouds |
| Temperature | 60.8°F |
| Humidity | 51% |
| Wind | 5.6 mp/h |
| Pressure | 30.1 Hg |
live aqi city ranking
Real-time Peru city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Lima, Lima | 92 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
US AQI
57*
live AQI index
Moderate
Overview
What is the current air quality in San Mateo?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 57* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 15.1*µg/m³ | |
!
PM2.5
x3
PM2.5 concentration in San Mateo is currently 3 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in San Mateo?
 | 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 |
Forecast
San Mateo air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Today | Moderate 57 AQI US |  60% | 60.8° 50° |  8.9 mp/h |
| Friday, Apr 26 | Good 31 AQI US  | 80% | 62.6° 48.2° | 6.7 mp/h |
| Saturday, Apr 27 | Good 31 AQI US | 80% | 62.6° 48.2° | 4.5 mp/h |
| Sunday, Apr 28 | Good 33 AQI US | 40% | 62.6° 48.2° | 6.7 mp/h |
| Monday, Apr 29 | Good 36 AQI US | 70% | 62.6° 48.2° | 6.7 mp/h |
| Tuesday, Apr 30 | Moderate 56 AQI US | 80% | 59° 50° | 4.5 mp/h |
| Wednesday, May 1 | Moderate 59 AQI US | 80% | 60.8° 50° | 8.9 mp/h |
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News
The latest air quality news and resources.
Where is the cleanest air quality in San Mateo?
No locations are available.
AQI US, Metric