Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-06-21 05:00 | 10.6 | 67.9 | 7.1 | - | 22.3 | 11.3 |
| 2021-06-21 04:00 | - | 66.8 | - | - | 21.8 | 10.6 |
| 2021-06-21 03:00 | 4.7 | 66.4 | 6.0 | - | 22.8 | 11.8 |
| 2021-06-21 02:00 | 3.9 | 65.3 | 5.9 | - | 22.6 | 12.2 |
| 2021-06-21 01:00 | 5.7 | 63.4 | 5.6 | - | 23.4 | 13.3 |
| 2021-06-21 00:00 | 17.4 | 56.4 | 5.6 | - | 23.8 | 13.3 |
| 2021-06-20 23:00 | 19.0 | 58.0 | 5.6 | - | 23.2 | 12.5 |
| 2021-06-20 22:00 | 13.9 | 66.5 | 5.6 | - | 22.1 | 11.9 |
| 2021-06-20 21:00 | 10.7 | 62.8 | 5.6 | - | 23.9 | 13.4 |
| 2021-06-20 20:00 | 11.8 | 60.1 | 5.6 | - | 21.9 | 11.9 |
| 2021-06-20 19:00 | 14.8 | 58.2 | 5.9 | - | 18.8 | 9.6 |
| 2021-06-20 18:00 | 12.0 | 60.9 | 6.0 | - | 20.2 | 11.2 |
| 2021-06-20 17:00 | 12.0 | 71.7 | 6.0 | - | 20.2 | 10.1 |
| 2021-06-20 16:00 | 10.3 | 75.8 | 5.9 | - | 21.5 | 11.6 |
| 2021-06-20 15:00 | 7.3 | 81.5 | 5.8 | - | 24.6 | 13.8 |
| 2021-06-20 14:00 | 10.1 | 80.2 | 5.8 | - | 24.9 | 14.3 |
| 2021-06-20 13:00 | 10.3 | 78.1 | 5.9 | - | 20.6 | 10.7 |
| 2021-06-20 12:00 | 9.4 | 75.8 | 5.9 | - | 18.2 | 7.8 |
| 2021-06-20 11:00 | 10.1 | 75.1 | 6.3 | - | 18.7 | 8.5 |
| 2021-06-20 10:00 | 9.7 | 71.1 | 6.1 | - | 20.1 | 10.1 |
| 2021-06-20 09:00 | 9.0 | 66.5 | 5.9 | - | 19.8 | 10.1 |
| 2021-06-20 08:00 | 14.1 | 57.8 | 5.8 | - | 19.2 | 9.7 |
| 2021-06-20 07:00 | 9.1 | 61.1 | 5.8 | - | 18.4 | 8.6 |
| 2021-06-20 06:00 | 7.1 | 63.9 | 5.9 | - | 17.4 | 6.8 |
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.