Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-05-04 04:00 | 5.9 | 120.1 | 1.4 | 540.9 | 15.1 | 9.7 |
| 2024-05-04 03:00 | 8.1 | 114.8 | 1.3 | 566.8 | 15.0 | 9.7 |
| 2024-05-04 02:00 | 11.5 | 113.0 | 1.5 | 561.5 | 16.4 | 10.8 |
| 2024-05-04 01:00 | - | - | - | - | 17.6 | 10.3 |
| 2024-05-04 00:00 | 20.7 | 108.9 | 1.6 | 595.1 | 27.3 | 14.7 |
| 2024-05-03 23:00 | 22.4 | 105.1 | 1.1 | 602.3 | 28.1 | 14.4 |
| 2024-05-03 22:00 | 21.6 | 109.4 | 1.1 | 586.2 | 25.7 | 14.9 |
| 2024-05-03 21:00 | 24.4 | 105.3 | 1.4 | 611.9 | 28.2 | 16.8 |
| 2024-05-03 20:00 | 28.2 | 97.5 | 1.4 | 637.9 | 28.6 | 16.4 |
| 2024-05-03 19:00 | 31.0 | 99.9 | 1.5 | 622.5 | 26.4 | 15.9 |
| 2024-05-03 18:00 | 32.9 | 100.6 | 1.5 | 607.3 | 24.3 | 15.5 |
| 2024-05-03 17:00 | 37.0 | 100.0 | 1.1 | 679.6 | 23.1 | 15.0 |
| 2024-05-03 16:00 | 27.5 | 107.4 | 1.3 | 588.0 | 21.0 | 14.4 |
| 2024-05-03 15:00 | 22.7 | 109.1 | 1.4 | 605.0 | 20.5 | 14.0 |
| 2024-05-03 14:00 | 21.1 | 109.5 | 1.5 | 585.3 | 20.6 | 13.3 |
| 2024-05-03 13:00 | 19.7 | 106.8 | 1.4 | 583.8 | 20.0 | 12.3 |
| 2024-05-03 12:00 | 24.6 | 98.8 | 1.3 | 605.3 | 21.1 | 12.4 |
| 2024-05-03 11:00 | 18.8 | 101.9 | 1.1 | 601.6 | 21.5 | 11.1 |
| 2024-05-03 10:00 | 22.5 | 95.2 | 1.1 | 591.7 | 18.7 | 9.7 |
| 2024-05-03 09:00 | 26.6 | 91.1 | 1.0 | 638.9 | 18.9 | 10.5 |
| 2024-05-03 08:00 | 18.8 | 101.2 | 1.3 | 534.4 | 15.9 | 10.3 |
| 2024-05-03 07:00 | 22.5 | 102.1 | 1.6 | 554.9 | 14.6 | 10.5 |
| 2024-05-03 06:00 | 8.6 | 119.9 | 1.3 | 573.8 | 13.9 | 8.9 |
| 2024-05-03 05:00 | 5.6 | 123.4 | 1.3 | 534.6 | 15.4 | 9.8 |
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.