Causeway Bay
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-09-22 19:00 | 45.8 | 22.9 | 4.2 | 774.8 | 28.6 | 18.8 |
| 2021-09-22 18:00 | 50.7 | 21.2 | 4.8 | 677.8 | 25.1 | 16.4 |
| 2021-09-22 17:00 | 44.9 | 25.1 | 4.8 | 620.6 | 22.2 | 13.0 |
| 2021-09-22 16:00 | 49.4 | 19.1 | 5.0 | 704.6 | 25.0 | 15.2 |
| 2021-09-22 15:00 | 56.0 | 19.1 | 5.2 | 679.6 | 27.6 | 16.9 |
| 2021-09-22 14:00 | 49.0 | 23.1 | 5.5 | 715.7 | 23.2 | 14.7 |
| 2021-09-22 13:00 | 49.1 | 21.5 | 5.8 | 720.3 | 17.6 | 9.8 |
| 2021-09-22 12:00 | 46.1 | 17.7 | 5.7 | 676.2 | 18.6 | 9.6 |
| 2021-09-22 11:00 | 40.8 | 11.7 | 6.0 | 743.6 | 18.7 | 10.7 |
| 2021-09-22 10:00 | 42.3 | 8.7 | 7.4 | 751.3 | 19.9 | 12.2 |
| 2021-09-22 09:00 | 49.9 | 5.8 | 10.1 | 826.2 | 27.6 | 17.3 |
| 2021-09-22 08:00 | 41.6 | 4.7 | 8.3 | 917.8 | 25.6 | 16.0 |
| 2021-09-22 07:00 | 33.1 | 4.2 | 6.4 | 829.7 | 17.4 | 10.6 |
| 2021-09-22 06:00 | 29.3 | 4.8 | 5.6 | 720.1 | 11.3 | 6.4 |
| 2021-09-22 05:00 | 26.9 | 6.9 | 5.1 | 630.8 | 9.2 | 4.4 |
| 2021-09-22 04:00 | 27.4 | 5.3 | 5.2 | 670.5 | 9.1 | 4.4 |
| 2021-09-22 03:00 | 27.9 | 4.9 | 5.2 | 756.7 | 10.0 | 6.1 |
| 2021-09-22 02:00 | 29.9 | 5.6 | 5.6 | 730.8 | 14.8 | 8.4 |
| 2021-09-22 01:00 | 43.7 | 3.3 | 7.0 | 743.9 | 23.6 | 15.5 |
| 2021-09-22 00:00 | 57.2 | 3.2 | 7.6 | 750.8 | 26.0 | 15.9 |
| 2021-09-21 23:00 | 67.4 | 3.0 | 9.6 | 992.9 | 34.7 | 23.4 |
| 2021-09-21 22:00 | 85.4 | 4.2 | 12.1 | 1,358.6 | 40.5 | 29.2 |
| 2021-09-21 21:00 | 74.3 | 4.3 | 9.0 | 1,265.2 | 50.2 | 36.0 |
| 2021-09-21 20:00 | 81.7 | 6.6 | 9.7 | 1,235.2 | 48.4 | 32.9 |
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.
