San Francisco air quality
Updated 21/10, 18:00
The data may not be up to date.
Current AQI
US EPA scale · observed at 18:00
60
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 12,5 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 16,1 µg/m³ | Particles ≤ 10 µm |
| O₃ | 49 µg/m³ | Ozone |
| NO₂ | 27,9 µg/m³ | Nitrogen dioxide |
| SO₂ | 2,1 µg/m³ | Sulphur dioxide |
| CO | 183 µg/m³ | Carbon monoxide |
AQI, next 20 hours
Show data table
| Time | AQI | Level |
|---|---|---|
| 22:00 | 59 | Moderate |
| 23:00 | 59 | Moderate |
| 00:00 | 58 | Moderate |
| 01:00 | 58 | Moderate |
| 02:00 | 58 | Moderate |
| 03:00 | 58 | Moderate |
| 04:00 | 58 | Moderate |
| 05:00 | 58 | Moderate |
| 06:00 | 58 | Moderate |
| 07:00 | 58 | Moderate |
| 08:00 | 58 | Moderate |
| 09:00 | 58 | Moderate |
| 10:00 | 57 | Moderate |
| 11:00 | 57 | Moderate |
| 12:00 | 57 | Moderate |
| 13:00 | 57 | Moderate |
| 14:00 | 57 | Moderate |
| 15:00 | 57 | Moderate |
| 16:00 | 57 | Moderate |
| 17:00 | 56 | Moderate |