| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2024-05-18 22:00 | 19.8 | 145.0 | 1.8 | - | 30.3 | 19.3 |
| 2024-05-18 21:00 | 21.2 | 147.8 | 1.8 | - | 28.5 | 19.9 |
| 2024-05-18 20:00 | 24.6 | 141.9 | 1.7 | - | 23.1 | 17.0 |
| 2024-05-18 19:00 | 34.8 | 123.9 | 1.5 | - | 22.1 | 15.8 |
| 2024-05-18 18:00 | 30.9 | 126.9 | 1.1 | - | 20.8 | 14.4 |
| 2024-05-18 17:00 | 33.5 | 125.3 | 1.3 | - | 20.9 | 14.2 |
| 2024-05-18 16:00 | 32.9 | 125.9 | 1.2 | - | 21.3 | 14.7 |
| 2024-05-18 15:00 | 29.8 | 127.2 | 1.2 | - | 22.4 | 14.8 |
| 2024-05-18 14:00 | 44.1 | 107.0 | 1.3 | - | 21.7 | 14.4 |
| 2024-05-18 13:00 | 33.8 | 105.3 | 1.3 | - | 22.0 | 14.1 |
| 2024-05-18 12:00 | 42.7 | 89.1 | 1.4 | - | 21.8 | 13.6 |
| 2024-05-18 11:00 | 39.4 | 90.2 | 1.4 | - | 21.2 | 12.3 |
| 2024-05-18 10:00 | 39.8 | 89.5 | 1.6 | - | 20.6 | 10.5 |
| 2024-05-18 09:00 | 54.0 | 70.5 | 1.6 | - | 22.1 | 12.1 |
| 2024-05-18 08:00 | 34.4 | 94.1 | 1.3 | - | 22.3 | 10.3 |
| 2024-05-18 07:00 | 33.8 | 94.1 | 1.3 | - | 22.9 | 11.1 |
| 2024-05-18 06:00 | 25.9 | 102.4 | 1.1 | - | 23.1 | 11.4 |
| 2024-05-18 05:00 | 18.3 | 110.9 | 1.0 | - | 21.0 | 9.2 |
| 2024-05-18 04:00 | 9.6 | 125.9 | 1.3 | - | 22.1 | 10.2 |
| 2024-05-18 03:00 | 11.4 | 134.9 | 1.4 | - | 22.8 | 10.8 |
| 2024-05-18 02:00 | 16.7 | 132.9 | 1.5 | - | 24.4 | 11.9 |
| 2024-05-18 01:00 | 27.2 | 118.1 | 1.2 | - | 23.3 | 10.5 |
| 2024-05-18 00:00 | 36.6 | 107.6 | 1.5 | - | 25.2 | 12.5 |
| 2024-05-17 23:00 | 39.7 | 107.5 | 1.4 | - | 24.7 | 11.4 |
(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.
(5) Owing to routine electricity inspection, monitoring data at Tuen Mun general air quality monitoring station will be suspended from 18 to 19 May 2024. We apologise for any inconvenience caused.
(6) Owing to suspension of electricity supply for maintenance work, the operation of Eastern Air Quality Monitoring Station will be suspended on 18 May 2024. We apologize for any inconvenience caused.