Past 24 Hours Pollutant Concentration Summary
Southern
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-05-04 12:00 | 19.4 | 83.6 | 1.2 | 582.6 | 10.2 | 3.1 |
| 2024-05-04 11:00 | 23.7 | 78.9 | 1.4 | 587.7 | 13.9 | 7.8 |
| 2024-05-04 10:00 | 24.5 | 78.3 | 1.2 | 588.0 | 13.3 | 9.6 |
| 2024-05-04 09:00 | 27.3 | 77.3 | 1.2 | 607.6 | 14.7 | 7.8 |
| 2024-05-04 08:00 | 21.9 | 84.9 | 1.4 | 601.4 | 17.2 | 4.5 |
| 2024-05-04 07:00 | 21.4 | 84.5 | 1.2 | 607.4 | 12.3 | 7.1 |
| 2024-05-04 06:00 | 15.2 | 93.0 | 1.2 | 585.9 | 0.6 | - |
| 2024-05-04 05:00 | 12.5 | 94.9 | 1.2 | 576.1 | 12.2 | 7.3 |
| 2024-05-04 04:00 | 9.1 | 99.7 | 1.1 | 574.2 | 32.0 | 11.1 |
| 2024-05-04 03:00 | 7.7 | 108.6 | 1.1 | 560.6 | 36.8 | 12.3 |
| 2024-05-04 02:00 | 7.8 | 115.0 | 1.3 | 566.9 | 38.3 | 13.4 |
| 2024-05-04 01:00 | 13.0 | 110.3 | 1.2 | 586.5 | 35.2 | 13.6 |
| 2024-05-04 00:00 | 14.1 | 108.8 | 1.3 | 602.5 | 35.2 | 12.9 |
| 2024-05-03 23:00 | 15.6 | 109.3 | 1.3 | 606.1 | 38.8 | 13.8 |
| 2024-05-03 22:00 | 16.1 | 112.0 | 1.2 | 616.1 | 42.4 | 16.7 |
| 2024-05-03 21:00 | 17.5 | 110.2 | 1.2 | 628.4 | 35.9 | 11.4 |
| 2024-05-03 20:00 | 20.6 | 103.5 | 1.5 | 616.6 | 32.8 | 8.6 |
| 2024-05-03 19:00 | 19.8 | 104.3 | 1.5 | 616.9 | 32.6 | 9.5 |
| 2024-05-03 18:00 | 24.6 | 101.4 | 1.4 | 619.2 | 26.6 | 5.9 |
| 2024-05-03 17:00 | 23.8 | 103.6 | 1.4 | 620.5 | 26.4 | 7.4 |
| 2024-05-03 16:00 | 25.4 | 107.3 | 1.8 | 600.9 | 34.9 | 12.7 |
| 2024-05-03 15:00 | 26.5 | 107.2 | 2.1 | 611.6 | 39.2 | 16.0 |
| 2024-05-03 14:00 | 23.8 | 110.5 | 2.4 | 599.9 | 33.4 | 13.6 |
| 2024-05-03 13:00 | 21.3 | 105.8 | 0.9 | 582.9 | 31.1 | 7.9 |
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.