Past 24 Hours Pollutant Concentration Summary
Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-28 22:00 | 29.2 | 50.8 | 1.2 | 574.2 | 10.6 | 5.8 |
| 2024-04-28 21:00 | 31.1 | 57.6 | 1.3 | 606.6 | 9.5 | 4.9 |
| 2024-04-28 20:00 | 20.8 | 73.2 | 0.9 | 558.9 | 8.7 | 5.7 |
| 2024-04-28 19:00 | 24.1 | 80.7 | 0.8 | 626.9 | 7.9 | 6.1 |
| 2024-04-28 18:00 | 21.2 | 90.2 | 1.3 | 626.6 | 5.8 | 4.7 |
| 2024-04-28 17:00 | 19.6 | 91.8 | 1.3 | 624.5 | 5.1 | 4.6 |
| 2024-04-28 16:00 | 22.6 | 83.5 | 1.2 | 612.8 | 1.7 | - |
| 2024-04-28 15:00 | 17.8 | 93.7 | 1.3 | 595.2 | - | - |
| 2024-04-28 14:00 | 22.0 | 91.5 | 1.3 | 600.9 | 6.2 | - |
| 2024-04-28 13:00 | 18.4 | 101.8 | 1.0 | 587.5 | 10.4 | 7.3 |
| 2024-04-28 12:00 | 14.4 | 103.9 | 1.2 | 589.6 | 11.9 | 6.3 |
| 2024-04-28 11:00 | 16.6 | 89.1 | 1.1 | 577.7 | 9.2 | 4.6 |
| 2024-04-28 10:00 | 15.2 | 94.0 | 1.3 | 606.6 | 2.8 | 1.5 |
| 2024-04-28 09:00 | 21.2 | 86.6 | 1.1 | 654.8 | 0.9 | 0.7 |
| 2024-04-28 08:00 | 18.6 | 72.7 | 1.4 | 592.5 | 6.0 | 3.3 |
| 2024-04-28 07:00 | 15.7 | 65.6 | 1.4 | 574.4 | 9.4 | 4.2 |
| 2024-04-28 06:00 | 13.4 | 37.6 | 1.4 | 499.4 | 17.1 | 9.4 |
| 2024-04-28 05:00 | 10.0 | 31.4 | 1.1 | 467.4 | 17.0 | 7.8 |
| 2024-04-28 04:00 | 5.1 | 35.1 | 1.1 | 451.1 | 11.7 | 6.2 |
| 2024-04-28 03:00 | 12.3 | 29.0 | 1.9 | 442.5 | 13.7 | 7.8 |
| 2024-04-28 02:00 | 17.9 | 25.8 | 3.9 | 457.4 | 17.2 | 7.5 |
| 2024-04-28 01:00 | - | - | - | - | 20.0 | 10.5 |
| 2024-04-28 00:00 | 25.0 | 20.3 | 1.3 | 548.2 | 20.8 | 12.4 |
| 2024-04-27 23:00 | 27.1 | 18.6 | 1.1 | 563.6 | 23.2 | 13.2 |
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.