San Mateo air quality
Updated 10. 18. 09:01
The data may not be up to date.
Current AQI
US EPA scale · observed at 09:00
51
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 5,7 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 7,3 µg/m³ | Particles ≤ 10 µm |
| O₃ | 51 µg/m³ | Ozone |
| NO₂ | 4,1 µg/m³ | Nitrogen dioxide |
| SO₂ | 4,9 µg/m³ | Sulphur dioxide |
| CO | 304 µg/m³ | Carbon monoxide |