Causeway Bay
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-12-04 09:00 | 114.7 | 6.4 | 9.9 | 710.4 | 36.9 | 18.0 |
| 2021-12-04 08:00 | 91.5 | 16.4 | 7.2 | 1,210.3 | 34.1 | 20.2 |
| 2021-12-04 07:00 | 74.3 | 26.7 | 5.3 | 413.8 | 25.6 | 16.4 |
| 2021-12-04 06:00 | 34.0 | 57.6 | 3.4 | 1,030.7 | 17.5 | 10.0 |
| 2021-12-04 05:00 | 37.4 | 55.1 | 4.3 | 368.4 | 19.9 | 12.4 |
| 2021-12-04 04:00 | - | 54.8 | - | - | 19.2 | 8.5 |
| 2021-12-04 03:00 | 48.2 | 44.2 | 5.1 | 313.6 | 27.1 | 12.8 |
| 2021-12-04 02:00 | 79.9 | 13.7 | 6.6 | 508.8 | 34.4 | 18.4 |
| 2021-12-04 01:00 | 93.6 | 4.8 | 8.1 | 606.6 | 38.1 | 17.2 |
| 2021-12-04 00:00 | 102.8 | 5.3 | 10.7 | 539.3 | 43.4 | 19.8 |
| 2021-12-03 23:00 | 97.2 | 9.5 | 10.2 | 561.0 | 48.9 | 27.2 |
| 2021-12-03 22:00 | 96.1 | 10.7 | 8.9 | 582.6 | 40.0 | 20.1 |
| 2021-12-03 21:00 | 101.4 | 13.4 | 8.7 | 680.3 | 49.5 | 26.3 |
| 2021-12-03 20:00 | 118.8 | 7.7 | 13.0 | 708.9 | 52.7 | 28.8 |
| 2021-12-03 19:00 | 120.2 | 9.1 | 11.3 | 762.7 | 56.7 | 26.2 |
| 2021-12-03 18:00 | 126.9 | 9.0 | 9.8 | 630.8 | 52.8 | 21.1 |
| 2021-12-03 17:00 | 113.2 | 8.8 | 7.9 | 453.5 | 51.8 | 21.9 |
| 2021-12-03 16:00 | 126.2 | 10.7 | 9.9 | 597.0 | 48.3 | 19.7 |
| 2021-12-03 15:00 | 133.2 | 12.8 | 9.3 | 455.3 | 39.3 | 14.1 |
| 2021-12-03 14:00 | 120.2 | 14.7 | 7.9 | 461.8 | 32.6 | 11.9 |
| 2021-12-03 13:00 | 114.2 | 16.1 | 8.0 | 444.9 | 34.7 | 13.1 |
| 2021-12-03 12:00 | 115.8 | 11.1 | 8.5 | 436.3 | 39.0 | 15.2 |
| 2021-12-03 11:00 | 108.0 | 12.0 | 7.4 | 442.8 | 38.0 | 11.9 |
| 2021-12-03 10:00 | 111.0 | 8.3 | 8.5 | 631.5 | 48.0 | 24.4 |
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.
