Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-04-20 14:00 | 21.1 | 50.3 | 2.2 | - | 21.4 | 13.7 |
| 2024-04-20 13:00 | 13.9 | 58.3 | 2.1 | - | 21.2 | 12.9 |
| 2024-04-20 12:00 | 17.5 | 55.1 | 2.1 | - | 19.9 | 11.4 |
| 2024-04-20 11:00 | 22.7 | 45.5 | 2.1 | - | 19.2 | 11.3 |
| 2024-04-20 10:00 | 21.1 | 44.4 | 2.2 | - | 16.8 | 9.7 |
| 2024-04-20 09:00 | 21.3 | 42.2 | 2.5 | - | 13.9 | 7.8 |
| 2024-04-20 08:00 | 16.1 | 45.1 | 2.3 | - | 13.4 | 7.4 |
| 2024-04-20 07:00 | 10.2 | 49.9 | 2.2 | - | 15.0 | 9.3 |
| 2024-04-20 06:00 | 6.9 | 52.3 | 2.1 | - | 16.4 | 10.5 |
| 2024-04-20 05:00 | 4.5 | 56.7 | 2.0 | - | 15.7 | 9.6 |
| 2024-04-20 04:00 | 8.5 | 51.4 | 2.1 | - | 13.3 | 7.5 |
| 2024-04-20 03:00 | 6.2 | 53.1 | 2.0 | - | 13.6 | 7.6 |
| 2024-04-20 02:00 | 8.5 | 51.7 | 2.0 | - | 16.8 | 10.3 |
| 2024-04-20 01:00 | - | 53.3 | - | - | 14.8 | 8.5 |
| 2024-04-20 00:00 | 8.3 | 50.3 | 1.7 | - | 15.4 | 9.1 |
| 2024-04-19 23:00 | 14.0 | 44.4 | 1.6 | - | 14.3 | 8.7 |
| 2024-04-19 22:00 | 10.9 | 47.9 | 1.6 | - | 16.7 | 10.5 |
| 2024-04-19 21:00 | 9.0 | 51.8 | 1.6 | - | 17.7 | 10.9 |
| 2024-04-19 20:00 | 9.9 | 52.6 | 1.8 | - | 18.8 | 12.1 |
| 2024-04-19 19:00 | 16.5 | 47.2 | 1.9 | - | 17.8 | 10.7 |
| 2024-04-19 18:00 | 21.6 | 48.0 | 2.0 | - | 17.0 | 9.9 |
| 2024-04-19 17:00 | 15.7 | 52.9 | 1.9 | - | 16.6 | 9.1 |
| 2024-04-19 16:00 | 24.9 | 41.8 | 2.0 | - | 19.3 | 11.3 |
| 2024-04-19 15:00 | 21.1 | 48.7 | 2.1 | - | 19.7 | 12.0 |
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.