Southern
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-09-21 21:00 | 10.3 | 28.5 | 3.9 | 377.1 | 16.1 | 1.3 |
| 2021-09-21 20:00 | 10.9 | 29.2 | 3.4 | 362.0 | 11.1 | 6.1 |
| 2021-09-21 19:00 | 11.0 | 32.2 | 4.0 | 382.6 | 10.4 | 10.1 |
| 2021-09-21 18:00 | 23.3 | 58.5 | 5.2 | 380.2 | 13.3 | 12.3 |
| 2021-09-21 17:00 | 24.5 | 59.2 | 5.6 | 368.5 | 13.2 | 10.9 |
| 2021-09-21 16:00 | 27.1 | 53.1 | 5.3 | 376.9 | 9.7 | 5.3 |
| 2021-09-21 15:00 | 31.7 | 32.8 | 4.0 | 400.4 | 7.5 | - |
| 2021-09-21 14:00 | 20.7 | 55.3 | 3.5 | 380.3 | 8.7 | 3.2 |
| 2021-09-21 13:00 | 19.3 | 52.9 | 5.3 | 348.3 | 11.7 | 4.2 |
| 2021-09-21 12:00 | 18.7 | 50.4 | 5.7 | 397.7 | 13.3 | 4.0 |
| 2021-09-21 11:00 | 25.0 | 30.5 | 8.1 | 419.9 | 17.7 | 8.1 |
| 2021-09-21 10:00 | 31.8 | 14.3 | 11.2 | 443.9 | 19.6 | 9.1 |
| 2021-09-21 09:00 | 36.9 | 9.4 | 8.2 | 529.8 | 10.0 | 4.6 |
| 2021-09-21 08:00 | 17.0 | 10.3 | 5.2 | 502.2 | 5.8 | 1.7 |
| 2021-09-21 07:00 | 12.7 | 8.8 | 4.6 | 403.4 | 11.3 | 6.6 |
| 2021-09-21 06:00 | 7.5 | 11.1 | 4.5 | 357.9 | 15.9 | 8.8 |
| 2021-09-21 05:00 | 4.7 | 13.6 | 4.3 | 350.2 | 14.3 | 2.7 |
| 2021-09-21 04:00 | 4.2 | 16.5 | 4.3 | 349.4 | 13.1 | - |
| 2021-09-21 03:00 | 5.1 | 18.6 | 4.5 | 358.2 | 7.2 | 4.1 |
| 2021-09-21 02:00 | 3.6 | 17.6 | 4.2 | 357.3 | 3.3 | - |
| 2021-09-21 01:00 | 4.5 | 18.8 | 4.0 | 373.0 | 11.4 | 5.4 |
| 2021-09-21 00:00 | 6.9 | 18.3 | 4.0 | 379.9 | 15.6 | 4.3 |
| 2021-09-20 23:00 | 9.6 | 15.1 | 4.2 | 381.7 | 4.2 | - |
| 2021-09-20 22:00 | 8.0 | 22.1 | 4.4 | 387.4 | - | 1.1 |
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.
