Past 24 Hours Pollutant Concentration Summary
Causeway Bay
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-05-04 10:00 | 87.9 | 19.4 | 2.5 | 708.9 | 20.8 | 15.9 |
| 2024-05-04 09:00 | 85.5 | 14.3 | 2.8 | 735.5 | 8.9 | 6.6 |
| 2024-05-04 08:00 | 76.8 | 31.0 | 1.7 | 497.5 | 7.9 | 6.9 |
| 2024-05-04 07:00 | 47.0 | 64.5 | 0.6 | 338.6 | 6.7 | - |
| 2024-05-04 06:00 | 25.2 | 88.0 | 0.6 | 335.7 | 10.7 | - |
| 2024-05-04 05:00 | - | 90.1 | - | - | 13.4 | 12.0 |
| 2024-05-04 04:00 | 14.5 | 107.0 | 0.4 | 308.7 | 15.8 | 9.0 |
| 2024-05-04 03:00 | 23.2 | 106.5 | 0.6 | 318.0 | 32.8 | 14.0 |
| 2024-05-04 02:00 | 40.4 | 97.3 | 0.6 | 482.4 | 40.4 | 19.1 |
| 2024-05-04 01:00 | 48.8 | 86.5 | 0.8 | 499.7 | 44.3 | 20.9 |
| 2024-05-04 00:00 | 41.4 | 87.5 | 0.6 | 378.6 | 51.4 | 25.2 |
| 2024-05-03 23:00 | 47.9 | 82.1 | 1.0 | 392.1 | 58.8 | 31.7 |
| 2024-05-03 22:00 | 51.9 | 81.5 | 0.8 | 407.2 | 61.5 | 33.6 |
| 2024-05-03 21:00 | 39.8 | 90.0 | 0.6 | 499.8 | 60.5 | 33.4 |
| 2024-05-03 20:00 | 47.7 | 78.2 | 0.9 | 512.6 | 61.1 | 32.5 |
| 2024-05-03 19:00 | 76.8 | 53.8 | 1.2 | 485.9 | 57.8 | 28.3 |
| 2024-05-03 18:00 | 71.2 | 60.7 | 1.0 | 483.8 | 50.2 | 26.3 |
| 2024-05-03 17:00 | 60.9 | 72.1 | 0.9 | 451.1 | 44.8 | 24.8 |
| 2024-05-03 16:00 | 68.2 | 71.5 | 1.1 | 448.2 | 46.5 | 26.0 |
| 2024-05-03 15:00 | 80.4 | 61.5 | 1.5 | 498.0 | 50.9 | 30.5 |
| 2024-05-03 14:00 | 90.4 | 55.0 | 2.1 | 528.5 | 50.3 | 27.4 |
| 2024-05-03 13:00 | 85.1 | 50.0 | 1.5 | 505.2 | 45.7 | 20.6 |
| 2024-05-03 12:00 | 75.1 | 51.5 | 1.4 | 450.9 | 48.6 | 23.3 |
| 2024-05-03 11:00 | 79.3 | 48.7 | 1.1 | 454.6 | 52.7 | 27.4 |
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.