Past 24 Hours Pollutant Concentration Summary
Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2023-09-26 05:00 | 12.2 | 38.6 | 5.7 | 584.8 | 9.9 | 6.0 |
| 2023-09-26 04:00 | 12.3 | 31.8 | 5.6 | 537.2 | 10.8 | 6.7 |
| 2023-09-26 03:00 | 12.0 | 36.1 | 5.7 | 560.8 | 13.5 | 9.2 |
| 2023-09-26 02:00 | 14.2 | - | 5.7 | 591.0 | 12.2 | 7.6 |
| 2023-09-26 01:00 | 15.5 | 50.8 | 5.8 | 598.5 | 12.5 | 7.9 |
| 2023-09-26 00:00 | 17.4 | 38.3 | 5.7 | 600.1 | 14.2 | 9.0 |
| 2023-09-25 23:00 | 18.4 | 41.9 | 5.6 | 578.8 | 15.7 | 9.6 |
| 2023-09-25 22:00 | 24.4 | 47.8 | 5.5 | 627.4 | 18.7 | 12.6 |
| 2023-09-25 21:00 | 23.9 | 45.8 | 5.8 | 662.5 | 17.6 | 11.2 |
| 2023-09-25 20:00 | 25.7 | 52.4 | 5.6 | 678.5 | 20.3 | 13.5 |
| 2023-09-25 19:00 | 28.7 | 48.0 | 5.6 | 686.1 | 18.8 | 12.3 |
| 2023-09-25 18:00 | 27.7 | 29.6 | 5.7 | 636.9 | 16.4 | 10.4 |
| 2023-09-25 17:00 | 22.7 | 30.0 | 5.3 | 588.9 | 15.1 | 9.3 |
| 2023-09-25 16:00 | 18.0 | 21.1 | 5.4 | 600.9 | 16.1 | 10.4 |
| 2023-09-25 15:00 | 17.6 | 24.3 | 4.9 | 595.4 | 16.5 | 11.4 |
| 2023-09-25 14:00 | 18.2 | 21.9 | 5.2 | 587.2 | 14.0 | 9.4 |
| 2023-09-25 13:00 | 17.7 | 21.6 | 5.6 | 612.0 | 11.4 | 6.4 |
| 2023-09-25 12:00 | 18.6 | 19.4 | 5.6 | 634.9 | 10.7 | 5.4 |
| 2023-09-25 11:00 | 18.7 | 15.3 | 5.8 | 635.5 | 13.1 | 7.0 |
| 2023-09-25 10:00 | 17.6 | 12.5 | 6.2 | 595.3 | 13.6 | 7.4 |
| 2023-09-25 09:00 | 17.3 | 9.5 | 6.4 | 550.9 | 10.8 | 5.0 |
| 2023-09-25 08:00 | 17.4 | 12.2 | 6.4 | 564.8 | 12.8 | 6.5 |
| 2023-09-25 07:00 | 21.3 | 13.3 | 6.1 | 603.5 | 10.1 | 4.3 |
| 2023-09-25 06:00 | 19.6 | 22.3 | 5.8 | 600.3 | 8.9 | 3.3 |
Remarks:
(1) Time shown is in Hong Kong time.
(2) NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates
(3) Concentration shown is in µg/m3.
(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.