Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2023-12-04 17:00 | 73.9 | 129.1 | 5.1 | - | 72.4 | 51.6 |
| 2023-12-04 16:00 | 71.9 | 108.0 | 5.0 | - | 62.0 | 45.2 |
| 2023-12-04 15:00 | 67.9 | 86.2 | 3.6 | - | 54.2 | 40.5 |
| 2023-12-04 14:00 | 59.7 | 72.8 | 2.4 | - | 42.1 | 33.9 |
| 2023-12-04 13:00 | 53.5 | 65.7 | 2.3 | - | 39.5 | 31.1 |
| 2023-12-04 12:00 | 64.5 | 44.3 | 4.2 | - | 47.3 | 34.7 |
| 2023-12-04 11:00 | 59.9 | 37.5 | 1.7 | - | 44.4 | 34.7 |
| 2023-12-04 10:00 | 54.7 | 32.6 | 2.0 | - | 52.4 | 38.1 |
| 2023-12-04 09:00 | 61.0 | 19.6 | 2.3 | - | 50.2 | 36.7 |
| 2023-12-04 08:00 | 58.9 | 18.6 | 2.0 | - | 46.8 | 34.7 |
| 2023-12-04 07:00 | 30.7 | 55.8 | 1.1 | - | 38.6 | 27.0 |
| 2023-12-04 06:00 | 18.6 | 75.5 | 1.6 | - | 35.7 | 25.8 |
| 2023-12-04 05:00 | 17.1 | 84.1 | 2.0 | - | 32.5 | 21.8 |
| 2023-12-04 04:00 | 13.3 | 93.6 | 2.0 | - | 28.8 | 19.1 |
| 2023-12-04 03:00 | 12.8 | 98.2 | 1.4 | - | 24.9 | 17.9 |
| 2023-12-04 02:00 | 13.5 | 97.6 | 1.4 | - | 24.1 | 16.8 |
| 2023-12-04 01:00 | - | 88.2 | - | - | 26.5 | 19.8 |
| 2023-12-04 00:00 | 23.1 | 95.0 | 2.0 | - | 37.0 | 28.2 |
| 2023-12-03 23:00 | 27.5 | 100.6 | 2.7 | - | 42.8 | 32.2 |
| 2023-12-03 22:00 | 29.5 | 101.9 | 2.9 | - | 41.8 | 31.9 |
| 2023-12-03 21:00 | 33.6 | 95.2 | 2.5 | - | 40.2 | 30.9 |
| 2023-12-03 20:00 | 34.1 | 94.7 | 2.1 | - | 39.9 | 31.0 |
| 2023-12-03 19:00 | 35.7 | 93.8 | 2.2 | - | 37.3 | 28.9 |
| 2023-12-03 18:00 | 40.2 | 87.5 | 2.2 | - | 36.8 | 28.3 |
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.