Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2023-09-23 05:00 | 12.2 | 68.5 | 3.6 | - | 7.8 | 6.7 |
| 2023-09-23 04:00 | 10.6 | 73.7 | 3.4 | - | 10.5 | 9.1 |
| 2023-09-23 03:00 | 13.2 | 78.1 | 3.4 | - | 14.1 | 12.4 |
| 2023-09-23 02:00 | 16.1 | 85.3 | 3.7 | - | 15.3 | 13.0 |
| 2023-09-23 01:00 | - | 93.1 | - | - | 16.8 | 14.1 |
| 2023-09-23 00:00 | 25.8 | 89.5 | 3.3 | - | 16.4 | 13.5 |
| 2023-09-22 23:00 | 29.5 | 87.3 | 3.3 | - | 16.7 | 13.5 |
| 2023-09-22 22:00 | 41.6 | 73.6 | 3.6 | - | 17.1 | 13.8 |
| 2023-09-22 21:00 | 48.2 | 67.1 | 3.3 | - | 18.1 | 14.6 |
| 2023-09-22 20:00 | 37.6 | 85.7 | 3.2 | - | 14.4 | 11.3 |
| 2023-09-22 19:00 | 20.1 | 108.1 | 3.0 | - | 16.2 | 13.1 |
| 2023-09-22 18:00 | 22.8 | 116.3 | 3.4 | - | 18.3 | 13.5 |
| 2023-09-22 17:00 | 41.5 | 98.1 | 3.4 | - | 20.3 | 13.3 |
| 2023-09-22 16:00 | 36.1 | 102.5 | 3.7 | - | 18.2 | 11.5 |
| 2023-09-22 15:00 | 32.1 | 100.7 | 3.6 | - | 13.9 | 9.3 |
| 2023-09-22 14:00 | 33.1 | 97.7 | 3.9 | - | 16.2 | 12.1 |
| 2023-09-22 13:00 | 46.2 | 73.5 | 4.7 | - | 17.3 | 11.8 |
| 2023-09-22 12:00 | 50.3 | 48.8 | 5.5 | - | 21.1 | 13.5 |
| 2023-09-22 11:00 | 69.8 | 28.8 | 8.0 | - | 20.2 | 12.4 |
| 2023-09-22 10:00 | 75.3 | 18.5 | 8.3 | - | 18.9 | 13.4 |
| 2023-09-22 09:00 | 68.6 | 28.0 | 10.8 | - | 16.0 | 11.9 |
| 2023-09-22 08:00 | 52.1 | 36.0 | 7.6 | - | 14.6 | 10.3 |
| 2023-09-22 07:00 | 41.9 | 46.2 | 4.8 | - | 18.4 | 14.0 |
| 2023-09-22 06:00 | 35.7 | 58.0 | 4.5 | - | 16.0 | 12.0 |
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.