Past 24 Hours Pollutant Concentration Summary
Causeway Bay
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-20 17:00 | 61.9 | 23.1 | 5.0 | 507.0 | 38.8 | 24.4 |
| 2024-04-20 16:00 | 51.2 | 34.1 | 4.3 | 416.5 | 44.3 | 26.6 |
| 2024-04-20 15:00 | 49.4 | 33.5 | 4.2 | 442.4 | 44.7 | 26.8 |
| 2024-04-20 14:00 | 61.5 | 29.9 | 4.7 | 469.9 | 39.8 | 21.2 |
| 2024-04-20 13:00 | 58.9 | 29.6 | 4.1 | 459.5 | 37.6 | 20.1 |
| 2024-04-20 12:00 | 41.9 | 40.4 | 3.8 | 433.4 | 34.1 | 19.1 |
| 2024-04-20 11:00 | 49.0 | 32.0 | 4.3 | 462.1 | 30.5 | 16.4 |
| 2024-04-20 10:00 | 58.1 | 26.2 | 4.1 | 453.5 | 36.9 | 22.8 |
| 2024-04-20 09:00 | 43.8 | 33.1 | 3.6 | 414.8 | 32.3 | 21.5 |
| 2024-04-20 08:00 | 45.1 | 29.3 | 3.7 | 425.3 | 23.7 | 15.4 |
| 2024-04-20 07:00 | 42.0 | 26.8 | 3.4 | 460.7 | 30.5 | 19.1 |
| 2024-04-20 06:00 | 34.7 | 33.9 | 3.3 | 782.0 | 27.4 | 18.2 |
| 2024-04-20 05:00 | - | 41.0 | - | - | 20.5 | 14.1 |
| 2024-04-20 04:00 | 21.3 | 46.0 | 3.0 | 586.3 | 15.1 | 11.2 |
| 2024-04-20 03:00 | 25.0 | 40.7 | 3.0 | 585.5 | 13.8 | 9.8 |
| 2024-04-20 02:00 | 23.4 | 42.4 | 3.0 | 527.1 | 19.7 | 12.6 |
| 2024-04-20 01:00 | 34.3 | 34.1 | 3.1 | 560.4 | 30.5 | 18.9 |
| 2024-04-20 00:00 | 37.3 | 28.7 | 3.5 | 558.4 | 29.5 | 18.5 |
| 2024-04-19 23:00 | 51.9 | 19.4 | 4.4 | 504.3 | 22.9 | 14.9 |
| 2024-04-19 22:00 | 37.2 | 28.8 | 3.8 | 506.3 | 22.5 | 15.5 |
| 2024-04-19 21:00 | 33.1 | 37.4 | 3.3 | 495.8 | 38.2 | 26.0 |
| 2024-04-19 20:00 | 49.6 | 25.6 | 4.3 | 570.1 | 28.5 | 16.9 |
| 2024-04-19 19:00 | 71.2 | 14.0 | 5.4 | 588.3 | 38.7 | 26.0 |
| 2024-04-19 18:00 | 54.4 | 26.8 | 4.2 | 449.4 | 41.9 | 28.3 |
Remarks:
(1) Time shown is in Hong Kong time.
(2) Concentration shown is in microgram per cubic metre (µg/m3).
(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates
(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.