San Mateo air quality
Updated 04/10, 18:06
The data may not be up to date.
Current AQI
US EPA scale · observed at 18:00
56
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 11,5 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 15 µg/m³ | Particles ≤ 10 µm |
| O₃ | 56 µg/m³ | Ozone |
| NO₂ | 21,4 µg/m³ | Nitrogen dioxide |
| SO₂ | 1,5 µg/m³ | Sulphur dioxide |
| CO | 145 µg/m³ | Carbon monoxide |