Past 24 Hours Pollutant Concentration Summary
Southern
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-29 22:00 | 23.8 | 26.8 | 1.0 | 412.8 | 12.6 | 7.6 |
| 2024-04-29 21:00 | 21.8 | 27.9 | 1.0 | 405.8 | 15.5 | 6.4 |
| 2024-04-29 20:00 | 31.7 | 22.8 | 1.1 | 411.8 | 17.5 | 6.9 |
| 2024-04-29 19:00 | 21.8 | 36.5 | 0.9 | 422.3 | 22.6 | 9.1 |
| 2024-04-29 18:00 | 12.2 | 46.8 | 1.1 | 446.0 | 24.2 | 9.2 |
| 2024-04-29 17:00 | 22.5 | 43.9 | 0.2 | 436.5 | 21.4 | 8.9 |
| 2024-04-29 16:00 | 31.7 | 39.1 | 0.3 | 432.2 | 20.5 | 6.9 |
| 2024-04-29 15:00 | - | 53.3 | 1.3 | 444.2 | 20.1 | 5.4 |
| 2024-04-29 14:00 | - | 47.6 | - | 440.0 | 24.5 | 11.1 |
| 2024-04-29 13:00 | 22.3 | 39.6 | - | 418.9 | 23.2 | 11.3 |
| 2024-04-29 12:00 | 20.4 | 39.9 | - | 427.3 | 21.3 | 9.4 |
| 2024-04-29 11:00 | 13.0 | 46.0 | - | 419.3 | 21.5 | 9.5 |
| 2024-04-29 10:00 | 13.9 | 42.1 | - | 408.0 | 17.0 | 5.8 |
| 2024-04-29 09:00 | 15.3 | 38.1 | - | 436.5 | 19.5 | 5.4 |
| 2024-04-29 08:00 | 15.4 | 46.4 | - | 391.8 | 20.8 | 5.8 |
| 2024-04-29 07:00 | 19.5 | 36.0 | - | 386.9 | 22.7 | 5.4 |
| 2024-04-29 06:00 | 17.2 | 34.7 | - | 430.0 | 24.3 | 3.9 |
| 2024-04-29 05:00 | - | 39.1 | - | 385.8 | 23.4 | 6.3 |
| 2024-04-29 04:00 | 5.6 | 42.1 | - | 379.6 | 23.7 | 10.7 |
| 2024-04-29 03:00 | 10.6 | 41.7 | - | 403.9 | 17.9 | 5.4 |
| 2024-04-29 02:00 | 11.6 | 47.3 | - | 389.1 | 18.1 | 3.5 |
| 2024-04-29 01:00 | 10.9 | 54.8 | - | 401.2 | 16.8 | 3.1 |
| 2024-04-29 00:00 | 17.9 | 53.2 | - | 426.4 | 14.8 | 9.4 |
| 2024-04-28 23:00 | 15.6 | 58.8 | - | 428.4 | 13.0 | 8.1 |
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.