Past 24 Hours Pollutant Concentration Summary
Yuen Long
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-06-21 04:00 | 9.1 | 54.6 | 7.9 | 565.2 | 22.3 | 12.4 |
| 2021-06-21 03:00 | 10.1 | 50.5 | 8.0 | 580.2 | 24.2 | 13.4 |
| 2021-06-21 02:00 | - | - | - | - | 25.0 | 14.0 |
| 2021-06-21 01:00 | - | - | - | - | 24.9 | 13.3 |
| 2021-06-21 00:00 | 12.2 | 58.6 | 7.9 | 584.9 | 24.5 | 13.1 |
| 2021-06-20 23:00 | 14.1 | 56.0 | 8.0 | 586.0 | 21.4 | 9.9 |
| 2021-06-20 22:00 | 13.9 | 54.3 | 7.9 | 536.1 | 20.7 | 10.0 |
| 2021-06-20 21:00 | 15.7 | 52.2 | 7.9 | 580.6 | 19.8 | 9.9 |
| 2021-06-20 20:00 | 22.6 | 46.2 | 8.0 | 668.6 | 19.1 | 10.1 |
| 2021-06-20 19:00 | 21.3 | 50.2 | 8.1 | 552.9 | 15.4 | 8.3 |
| 2021-06-20 18:00 | 13.8 | 64.9 | 8.0 | 432.3 | 15.9 | 8.4 |
| 2021-06-20 17:00 | 12.5 | 76.9 | 8.0 | 582.8 | 20.1 | 11.2 |
| 2021-06-20 16:00 | 12.0 | 85.0 | 8.0 | 637.6 | 23.8 | 13.7 |
| 2021-06-20 15:00 | 20.2 | 80.0 | 7.9 | 680.5 | 25.2 | 14.7 |
| 2021-06-20 14:00 | 18.5 | 78.2 | 7.9 | 629.3 | 24.9 | 14.2 |
| 2021-06-20 13:00 | 13.3 | 84.8 | 8.0 | 568.0 | 22.2 | 10.5 |
| 2021-06-20 12:00 | 13.6 | 74.5 | 8.0 | 568.7 | 24.2 | 11.9 |
| 2021-06-20 11:00 | 13.4 | 69.8 | 8.0 | 572.4 | 21.6 | 12.2 |
| 2021-06-20 10:00 | 13.7 | 66.8 | 7.9 | 542.8 | 19.7 | 10.4 |
| 2021-06-20 09:00 | 12.1 | 61.3 | 8.6 | 465.0 | 21.1 | 11.7 |
| 2021-06-20 08:00 | 11.2 | 59.4 | 8.0 | 494.0 | 21.6 | 11.6 |
| 2021-06-20 07:00 | 17.3 | 53.7 | 7.8 | 522.7 | 21.7 | 12.1 |
| 2021-06-20 06:00 | 9.5 | 60.5 | 7.9 | 555.4 | 20.9 | 11.5 |
| 2021-06-20 05:00 | 7.4 | 62.4 | 7.9 | 545.9 | 21.0 | 10.8 |
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.