Gemeente Leiden air quality
Updated 10. 21. 03:01
The data may not be up to date.
Current AQI
US EPA scale · observed at 03:00
54
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 14,6 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 15,9 µg/m³ | Particles ≤ 10 µm |
| O₃ | 13 µg/m³ | Ozone |
| NO₂ | 29,9 µg/m³ | Nitrogen dioxide |
| SO₂ | 2,1 µg/m³ | Sulphur dioxide |
| CO | 249 µg/m³ | Carbon monoxide |
AQI, next 11 hours
Show data table
| Time | AQI | Level |
|---|---|---|
| 16:00 | 53 | Moderate |
| 17:00 | 52 | Moderate |
| 18:00 | 51 | Moderate |
| 19:00 | 51 | Moderate |
| 20:00 | 50 | Good |
| 21:00 | 48 | Good |
| 22:00 | 46 | Good |
| 23:00 | 44 | Good |
| 00:00 | 42 | Good |
| 01:00 | 39 | Good |
| 02:00 | 37 | Good |