Quận 4 air quality
Updated 10/21 07:01
The data may not be up to date.
Current AQI
US EPA scale · observed at 07:00
72
ModerateUnusually sensitive people should limit prolonged outdoor exertion.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 25,2 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 26 µg/m³ | Particles ≤ 10 µm |
| O₃ | 24 µg/m³ | Ozone |
| NO₂ | 36,1 µg/m³ | Nitrogen dioxide |
| SO₂ | 40,4 µg/m³ | Sulphur dioxide |
| CO | 1.549 µg/m³ | Carbon monoxide |
AQI, next 17 hours
Show data table
| Time | AQI | Level |
|---|---|---|
| 14:00 | 76 | Moderate |
| 15:00 | 80 | Moderate |
| 16:00 | 118 | Unhealthy for sensitive groups |
| 17:00 | 147 | Unhealthy for sensitive groups |
| 18:00 | 159 | Unhealthy |
| 19:00 | 157 | Unhealthy |
| 20:00 | 142 | Unhealthy for sensitive groups |
| 21:00 | 114 | Unhealthy for sensitive groups |
| 22:00 | 82 | Moderate |
| 23:00 | 83 | Moderate |
| 00:00 | 85 | Moderate |
| 01:00 | 88 | Moderate |
| 02:00 | 91 | Moderate |
| 03:00 | 94 | Moderate |
| 04:00 | 96 | Moderate |
| 05:00 | 99 | Moderate |
| 06:00 | 100 | Moderate |