Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-25 18:00 | 36.7 | 25.5 | 2.1 | 523.6 | 10.0 | 6.5 |
| 2024-04-25 17:00 | 44.1 | 22.5 | 2.1 | 511.7 | 9.1 | 6.1 |
| 2024-04-25 16:00 | 27.0 | 48.9 | 1.9 | 511.3 | 8.3 | 4.0 |
| 2024-04-25 15:00 | 32.2 | 69.1 | 2.6 | 544.1 | 14.7 | 7.0 |
| 2024-04-25 14:00 | 28.7 | 51.7 | 1.8 | 528.3 | 6.3 | 5.2 |
| 2024-04-25 13:00 | 14.9 | 40.9 | 1.3 | 501.7 | 11.7 | 10.3 |
| 2024-04-25 12:00 | 16.3 | 35.1 | 1.4 | 513.9 | 13.3 | 9.8 |
| 2024-04-25 11:00 | 37.2 | 23.8 | 1.6 | 549.8 | 17.2 | 12.6 |
| 2024-04-25 10:00 | 43.9 | 24.3 | 1.6 | 634.0 | 14.9 | 10.9 |
| 2024-04-25 09:00 | 60.3 | 20.8 | 1.8 | 713.4 | 12.0 | 7.1 |
| 2024-04-25 08:00 | 62.2 | 27.8 | 1.6 | 734.5 | 11.6 | 6.8 |
| 2024-04-25 07:00 | 29.7 | 53.4 | 1.3 | 696.3 | 7.6 | 4.5 |
| 2024-04-25 06:00 | 17.3 | 74.2 | 1.1 | 638.0 | 8.2 | 5.1 |
| 2024-04-25 05:00 | 9.6 | 82.7 | 1.2 | 612.9 | 12.1 | 7.5 |
| 2024-04-25 04:00 | 6.3 | 82.2 | 1.2 | 595.2 | 12.2 | 8.5 |
| 2024-04-25 03:00 | 8.6 | 81.9 | 1.1 | 578.9 | 13.6 | 9.5 |
| 2024-04-25 02:00 | 10.9 | 79.5 | 0.7 | 638.0 | 18.9 | 12.6 |
| 2024-04-25 01:00 | 16.2 | 63.7 | 1.1 | 643.9 | 18.1 | 12.8 |
| 2024-04-25 00:00 | 23.2 | 60.8 | 1.3 | 686.5 | 26.2 | 19.5 |
| 2024-04-24 23:00 | 32.1 | 54.2 | 1.6 | 735.4 | 30.7 | 22.9 |
| 2024-04-24 22:00 | 38.0 | 48.8 | 1.7 | 775.5 | 31.5 | 24.2 |
| 2024-04-24 21:00 | 54.4 | 37.0 | 1.9 | 789.4 | 32.2 | 24.3 |
| 2024-04-24 20:00 | 71.1 | 25.9 | 3.5 | 828.8 | 34.0 | 24.6 |
| 2024-04-24 19:00 | 87.8 | 8.1 | 3.7 | 840.5 | 26.4 | 18.0 |
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.