Past 24 Hours Pollutant Concentration Summary
Southern
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-20 22:00 | 22.5 | 51.5 | 0.0 | 538.1 | 29.0 | 14.6 |
| 2024-04-20 21:00 | 19.2 | 46.8 | 0.7 | 551.1 | 26.4 | 12.9 |
| 2024-04-20 20:00 | 19.3 | 46.9 | 1.1 | 502.4 | 21.2 | 9.5 |
| 2024-04-20 19:00 | 24.3 | 46.7 | 1.4 | 508.9 | 26.4 | 11.0 |
| 2024-04-20 18:00 | 20.9 | 51.4 | 1.3 | 508.7 | 19.8 | 11.1 |
| 2024-04-20 17:00 | 26.5 | 50.5 | 2.2 | 506.5 | 16.9 | 11.4 |
| 2024-04-20 16:00 | 18.4 | 60.2 | 1.5 | 488.3 | 24.1 | 11.9 |
| 2024-04-20 15:00 | 16.6 | 61.8 | 2.0 | 487.5 | 32.1 | 13.4 |
| 2024-04-20 14:00 | 22.4 | 57.1 | 2.6 | 516.9 | 30.7 | 11.6 |
| 2024-04-20 13:00 | 23.8 | 54.5 | 2.2 | 506.1 | 18.9 | 7.7 |
| 2024-04-20 12:00 | 26.6 | 46.1 | 2.3 | 504.3 | 17.0 | 10.5 |
| 2024-04-20 11:00 | 20.8 | 49.1 | 1.6 | 503.9 | 22.5 | 13.3 |
| 2024-04-20 10:00 | 20.5 | 47.4 | 0.8 | 503.6 | 23.9 | 10.1 |
| 2024-04-20 09:00 | 27.9 | 38.6 | 2.0 | 490.4 | 20.8 | 6.2 |
| 2024-04-20 08:00 | 11.7 | 48.7 | 0.6 | 470.1 | 19.3 | 7.6 |
| 2024-04-20 07:00 | 13.5 | 46.3 | 0.8 | 465.2 | 20.2 | 10.7 |
| 2024-04-20 06:00 | 13.8 | 46.8 | 0.6 | 462.5 | 19.7 | 13.7 |
| 2024-04-20 05:00 | 7.3 | 52.7 | 0.1 | 461.0 | 19.4 | 11.5 |
| 2024-04-20 04:00 | 13.9 | 46.6 | 0.6 | 459.5 | 18.1 | 9.9 |
| 2024-04-20 03:00 | 7.3 | 51.2 | 0.6 | 457.2 | 16.2 | 9.3 |
| 2024-04-20 02:00 | 16.7 | 42.9 | 0.5 | 467.9 | 16.2 | 6.4 |
| 2024-04-20 01:00 | 12.7 | 46.7 | 0.6 | 471.5 | 19.0 | 6.8 |
| 2024-04-20 00:00 | 12.8 | 46.8 | 0.1 | 475.4 | 19.7 | 7.3 |
| 2024-04-19 23:00 | 19.7 | 38.8 | 0.5 | 488.2 | 16.7 | 8.2 |
Remarks:
(1) Time shown is in Hong Kong time.
(2) Concentration shown is in microgram per cubic metre (µg/m3).
(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates
(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.