Past 24 Hours Pollutant Concentration Summary
Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-12-02 07:00 | 35.8 | 51.0 | 14.6 | 523.4 | 36.9 | 17.2 |
| 2021-12-02 06:00 | 28.1 | 58.6 | 15.1 | 499.4 | 35.3 | 16.0 |
| 2021-12-02 05:00 | 23.8 | 64.1 | 15.4 | 510.0 | 36.1 | 16.4 |
| 2021-12-02 04:00 | 24.7 | 64.3 | 16.0 | 506.6 | 34.3 | 13.6 |
| 2021-12-02 03:00 | 28.1 | 62.2 | 17.5 | 517.5 | 37.4 | 15.4 |
| 2021-12-02 02:00 | 37.0 | 53.3 | 20.5 | 546.4 | 40.4 | 17.9 |
| 2021-12-02 01:00 | - | - | - | - | 42.3 | 17.5 |
| 2021-12-02 00:00 | 62.4 | 32.0 | 14.6 | 599.8 | 43.0 | 16.5 |
| 2021-12-01 23:00 | 61.0 | 38.9 | 14.2 | 583.3 | 46.8 | 20.2 |
| 2021-12-01 22:00 | 68.3 | 33.2 | 14.1 | 640.7 | 50.0 | 22.0 |
| 2021-12-01 21:00 | 82.4 | 29.4 | 13.9 | 660.1 | 59.6 | 25.6 |
| 2021-12-01 20:00 | 92.2 | 24.8 | 13.6 | 649.3 | 60.8 | 24.7 |
| 2021-12-01 19:00 | 73.2 | 49.0 | 13.3 | 621.5 | 59.6 | 21.0 |
| 2021-12-01 18:00 | 80.2 | 52.6 | 13.0 | 621.1 | 59.5 | 18.2 |
| 2021-12-01 17:00 | 68.8 | 68.6 | 13.2 | 571.8 | 60.9 | 18.7 |
| 2021-12-01 16:00 | 57.1 | 79.2 | 12.5 | 553.7 | 57.2 | 18.6 |
| 2021-12-01 15:00 | 39.4 | 93.3 | 12.2 | 515.3 | 47.6 | 17.5 |
| 2021-12-01 14:00 | 40.2 | 85.8 | 12.4 | 539.8 | 43.5 | 15.8 |
| 2021-12-01 13:00 | 37.6 | 77.6 | 12.4 | 530.4 | 44.9 | 13.6 |
| 2021-12-01 12:00 | 35.7 | 68.9 | 12.4 | 533.8 | 45.7 | 14.3 |
| 2021-12-01 11:00 | 30.5 | 68.8 | 12.6 | 523.6 | 47.6 | 13.0 |
| 2021-12-01 10:00 | 29.0 | 66.3 | 13.0 | 545.9 | 50.2 | 15.9 |
| 2021-12-01 09:00 | 31.4 | 62.6 | 13.2 | 547.0 | 43.7 | 15.1 |
| 2021-12-01 08:00 | 40.6 | 53.5 | 13.1 | 551.9 | 39.1 | 17.7 |
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.