Past 24 Hours Pollutant Concentration Summary
Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-10-22 03:00 | 14.9 | 40.1 | 9.0 | 474.3 | 6.5 | 4.1 |
| 2021-10-22 02:00 | 16.2 | 42.1 | 9.2 | 475.5 | 8.2 | 5.1 |
| 2021-10-22 01:00 | 19.3 | 43.5 | 9.3 | 480.8 | 12.9 | 7.1 |
| 2021-10-22 00:00 | 25.2 | 40.1 | 9.5 | 484.1 | 15.2 | 7.1 |
| 2021-10-21 23:00 | 30.6 | 37.3 | 9.7 | 501.3 | 19.9 | 8.7 |
| 2021-10-21 22:00 | 38.7 | 30.1 | 9.6 | 550.6 | 26.5 | 12.7 |
| 2021-10-21 21:00 | 44.8 | 22.0 | 9.6 | 596.9 | 32.3 | 13.9 |
| 2021-10-21 20:00 | 48.1 | 20.4 | 10.1 | 611.5 | 29.6 | 11.3 |
| 2021-10-21 19:00 | 51.5 | 25.1 | 9.7 | 592.1 | 28.6 | 8.6 |
| 2021-10-21 18:00 | 48.2 | 29.4 | 9.9 | 580.5 | 26.1 | 7.4 |
| 2021-10-21 17:00 | 42.1 | 34.2 | 9.9 | 569.8 | 25.2 | 8.1 |
| 2021-10-21 16:00 | 37.5 | 38.4 | 9.4 | 567.7 | 29.2 | 9.0 |
| 2021-10-21 15:00 | 36.6 | 38.4 | 10.0 | 560.4 | 30.9 | 10.8 |
| 2021-10-21 14:00 | 36.4 | 46.4 | 9.9 | 573.8 | 35.8 | 13.6 |
| 2021-10-21 13:00 | 45.4 | 41.7 | 9.8 | 606.9 | 40.6 | 18.8 |
| 2021-10-21 12:00 | 54.6 | 27.9 | 9.8 | 622.4 | 32.3 | 13.9 |
| 2021-10-21 11:00 | 60.6 | 30.5 | 10.3 | 568.2 | 35.5 | 15.4 |
| 2021-10-21 10:00 | 63.2 | 25.2 | 10.0 | 599.1 | 35.8 | 16.7 |
| 2021-10-21 09:00 | 56.3 | 20.8 | 9.9 | 590.1 | 27.7 | 15.2 |
| 2021-10-21 08:00 | 53.6 | 8.7 | 10.0 | 710.1 | 27.3 | 15.7 |
| 2021-10-21 07:00 | 49.1 | 1.5 | 9.5 | 641.0 | 21.2 | 11.8 |
| 2021-10-21 06:00 | 40.8 | 10.7 | 9.7 | 550.9 | 17.9 | 9.1 |
| 2021-10-21 05:00 | 40.0 | 6.9 | 9.9 | 588.3 | 24.1 | 13.3 |
| 2021-10-21 04:00 | 48.8 | 17.2 | 10.4 | 585.6 | 23.3 | 12.2 |
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.