Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-12-04 08:00 | 59.4 | 42.5 | 14.5 | 570.9 | 25.3 | 14.0 |
| 2021-12-04 07:00 | 61.0 | 35.4 | 15.2 | 608.1 | 23.8 | 13.4 |
| 2021-12-04 06:00 | 37.7 | 54.8 | 16.4 | 556.1 | 28.3 | 16.5 |
| 2021-12-04 05:00 | 43.0 | 45.1 | 16.5 | 588.7 | 25.9 | 13.9 |
| 2021-12-04 04:00 | 28.5 | 63.9 | 17.3 | 546.7 | 24.5 | 12.3 |
| 2021-12-04 03:00 | 53.5 | 30.9 | 16.5 | 662.5 | 29.4 | 16.7 |
| 2021-12-04 02:00 | 65.9 | 18.8 | 19.2 | 696.6 | 30.9 | 15.3 |
| 2021-12-04 01:00 | - | - | - | - | 33.2 | 15.9 |
| 2021-12-04 00:00 | 81.1 | 21.8 | 16.3 | 704.0 | 35.4 | 16.6 |
| 2021-12-03 23:00 | 67.6 | 33.5 | 16.8 | 633.6 | 38.5 | 17.3 |
| 2021-12-03 22:00 | 93.6 | 12.7 | 14.1 | 852.6 | 50.4 | 22.5 |
| 2021-12-03 21:00 | 111.1 | 2.4 | 13.5 | 1,261.4 | 52.9 | 23.3 |
| 2021-12-03 20:00 | 112.7 | 4.9 | 13.3 | 949.9 | 44.1 | 17.8 |
| 2021-12-03 19:00 | 108.4 | 12.5 | 12.9 | 745.8 | 37.5 | 13.2 |
| 2021-12-03 18:00 | 88.3 | 32.3 | 12.6 | 655.1 | 37.0 | 11.4 |
| 2021-12-03 17:00 | 62.6 | 59.6 | 12.9 | 550.3 | 43.0 | 13.7 |
| 2021-12-03 16:00 | 55.3 | 71.9 | 13.0 | 543.0 | 50.6 | 18.8 |
| 2021-12-03 15:00 | 44.1 | 88.4 | 13.0 | 529.1 | 55.1 | 19.8 |
| 2021-12-03 14:00 | 54.2 | 90.0 | 13.1 | 550.1 | 45.2 | 14.4 |
| 2021-12-03 13:00 | 39.0 | 81.4 | 13.2 | 538.3 | 40.0 | 12.1 |
| 2021-12-03 12:00 | 35.4 | 71.9 | 13.3 | 522.5 | 40.0 | 12.1 |
| 2021-12-03 11:00 | 40.6 | 62.3 | 13.6 | 567.5 | 43.7 | 15.3 |
| 2021-12-03 10:00 | 52.9 | 45.5 | 14.9 | 594.2 | 43.6 | 18.5 |
| 2021-12-03 09:00 | 63.9 | 29.5 | 15.5 | 628.8 | 42.2 | 19.3 |
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.
