Past 24 Hours Pollutant Concentration Summary
North
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-05-04 04:00 | 11.5 | 112.6 | 1.9 | 331.7 | 14.1 | - |
| 2024-05-04 03:00 | 5.3 | 124.7 | 1.2 | 282.6 | 13.8 | - |
| 2024-05-04 02:00 | 6.5 | 127.8 | 1.2 | 301.0 | 11.8 | - |
| 2024-05-04 01:00 | 6.0 | 130.2 | 1.5 | 292.6 | 19.9 | 19.6 |
| 2024-05-04 00:00 | 9.8 | 127.1 | 2.0 | 305.1 | 20.4 | 18.7 |
| 2024-05-03 23:00 | 14.8 | 123.7 | 1.9 | 319.5 | 14.9 | - |
| 2024-05-03 22:00 | 17.3 | 124.9 | 1.9 | 446.3 | 17.2 | 15.9 |
| 2024-05-03 21:00 | 17.6 | 123.0 | 2.1 | 412.2 | 16.6 | 12.0 |
| 2024-05-03 20:00 | 18.4 | 117.1 | 2.0 | 505.4 | 12.1 | - |
| 2024-05-03 19:00 | 20.9 | 116.1 | 2.1 | 373.2 | 10.0 | - |
| 2024-05-03 18:00 | 26.2 | 116.8 | 2.1 | 394.6 | 18.7 | 14.1 |
| 2024-05-03 17:00 | 34.7 | 112.2 | 2.6 | 447.9 | 26.7 | 17.0 |
| 2024-05-03 16:00 | 29.1 | 117.6 | 2.5 | 557.4 | 22.5 | 15.7 |
| 2024-05-03 15:00 | 21.4 | 116.1 | 2.5 | 408.6 | 18.7 | 13.2 |
| 2024-05-03 14:00 | 21.8 | 108.5 | 2.3 | 330.8 | 19.1 | 13.6 |
| 2024-05-03 13:00 | 18.6 | 107.6 | 2.1 | 338.4 | 21.1 | 13.1 |
| 2024-05-03 12:00 | 23.3 | 98.6 | 2.0 | 312.5 | 22.8 | 13.4 |
| 2024-05-03 11:00 | 20.2 | 99.0 | 2.2 | 366.5 | 23.5 | 14.8 |
| 2024-05-03 10:00 | 28.7 | 86.4 | 1.8 | 297.3 | 22.8 | 15.3 |
| 2024-05-03 09:00 | 28.5 | 86.8 | 1.9 | 301.1 | 21.0 | 17.8 |
| 2024-05-03 08:00 | 27.6 | 88.5 | 1.8 | 309.0 | 17.1 | 14.2 |
| 2024-05-03 07:00 | 16.5 | 101.8 | 2.0 | 297.7 | 16.2 | 11.6 |
| 2024-05-03 06:00 | 11.4 | 112.1 | 2.0 | 300.6 | 20.2 | 12.9 |
| 2024-05-03 05:00 | 7.0 | 119.7 | 2.3 | 306.6 | 23.5 | 17.7 |
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.