サンマテオ郡 air quality
Updated 10/19 21:01
The data may not be up to date.
Current AQI
US EPA scale · observed at 21:00
51
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 9,7 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 16,2 µg/m³ | Particles ≤ 10 µm |
| O₃ | 73 µg/m³ | Ozone |
| NO₂ | 4,7 µg/m³ | Nitrogen dioxide |
| SO₂ | 1 µg/m³ | Sulphur dioxide |
| CO | 118 µg/m³ | Carbon monoxide |
AQI, next 22 hours
Show data table
| Time | AQI | Level |
|---|---|---|
| 23:00 | 50 | Good |
| 00:00 | 49 | Good |
| 01:00 | 49 | Good |
| 02:00 | 49 | Good |
| 03:00 | 50 | Good |
| 04:00 | 50 | Good |
| 05:00 | 50 | Good |
| 06:00 | 51 | Moderate |
| 07:00 | 51 | Moderate |
| 08:00 | 51 | Moderate |
| 09:00 | 52 | Moderate |
| 10:00 | 52 | Moderate |
| 11:00 | 52 | Moderate |
| 12:00 | 53 | Moderate |
| 13:00 | 53 | Moderate |
| 14:00 | 53 | Moderate |
| 15:00 | 53 | Moderate |
| 16:00 | 53 | Moderate |
| 17:00 | 53 | Moderate |
| 18:00 | 54 | Moderate |
| 19:00 | 54 | Moderate |
| 20:00 | 54 | Moderate |