Past 24 Hours Pollutant Concentration Summary
Tsuen Wan
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-10-26 02:00 | 29.5 | 38.9 | 5.0 | 433.1 | 20.8 | 15.3 |
| 2021-10-26 01:00 | 40.7 | 32.2 | 5.3 | 470.8 | 21.4 | 15.9 |
| 2021-10-26 00:00 | 45.9 | 28.4 | 5.2 | 493.4 | 21.0 | 15.6 |
| 2021-10-25 23:00 | 54.7 | 25.9 | 5.1 | 522.5 | 21.8 | 15.3 |
| 2021-10-25 22:00 | 62.3 | 31.4 | 5.6 | 612.0 | 27.2 | 19.0 |
| 2021-10-25 21:00 | 76.1 | 25.7 | 5.1 | 650.3 | 29.5 | 20.0 |
| 2021-10-25 20:00 | 90.3 | 28.8 | 5.0 | 706.6 | 32.4 | 21.3 |
| 2021-10-25 19:00 | 84.2 | 52.1 | 5.0 | 624.5 | 28.6 | 18.6 |
| 2021-10-25 18:00 | 62.2 | 89.1 | 5.0 | 526.3 | 23.2 | 14.9 |
| 2021-10-25 17:00 | 54.0 | 105.9 | 5.0 | 458.1 | 21.9 | 14.0 |
| 2021-10-25 16:00 | 47.6 | 105.7 | 5.0 | 469.3 | 16.9 | 11.1 |
| 2021-10-25 15:00 | 55.8 | 86.1 | 5.1 | 492.6 | 17.5 | 12.2 |
| 2021-10-25 14:00 | 30.5 | 92.9 | 5.0 | 406.2 | 15.7 | 11.6 |
| 2021-10-25 13:00 | 27.8 | 78.9 | 4.9 | 421.7 | 15.7 | 11.4 |
| 2021-10-25 12:00 | 39.3 | 58.3 | 4.9 | 459.1 | 14.5 | 10.6 |
| 2021-10-25 11:00 | 43.6 | 40.8 | 5.0 | 499.6 | 13.1 | 9.9 |
| 2021-10-25 10:00 | 34.5 | 31.1 | 4.9 | 461.3 | 12.7 | 10.1 |
| 2021-10-25 09:00 | 42.5 | 24.6 | 5.0 | 485.0 | 10.4 | 8.6 |
| 2021-10-25 08:00 | 34.3 | 30.2 | 4.7 | 454.1 | 10.4 | 8.8 |
| 2021-10-25 07:00 | 24.9 | 39.4 | 4.5 | 404.9 | 9.4 | 8.1 |
| 2021-10-25 06:00 | 19.7 | 45.1 | 4.4 | 361.6 | 9.8 | 9.0 |
| 2021-10-25 05:00 | 13.9 | 47.2 | 4.3 | 377.6 | 9.8 | 8.6 |
| 2021-10-25 04:00 | 12.3 | 47.1 | 4.3 | 384.3 | 11.7 | 10.0 |
| 2021-10-25 03:00 | 15.9 | 42.6 | 4.5 | 414.8 | 10.0 | 8.8 |
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.
(5) Owing to the maintenance works, the operation of Tai Po Air Quality Monitoring Station will be temporarily suspended on 28 October 2021. We apologize for any inconvenience caused.