Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2022-12-09 16:00 | 72.1 | 99.1 | 8.0 | - | 60.1 | 37.2 |
| 2022-12-09 15:00 | 67.0 | 77.8 | 7.0 | - | 32.5 | 20.4 |
| 2022-12-09 14:00 | 45.7 | 64.4 | 5.5 | - | 28.4 | 19.6 |
| 2022-12-09 13:00 | 44.8 | 47.5 | 6.7 | - | 28.2 | 19.9 |
| 2022-12-09 12:00 | 36.4 | 43.3 | 5.9 | - | 26.3 | 19.8 |
| 2022-12-09 11:00 | 46.4 | 28.4 | 7.8 | - | 26.8 | 21.0 |
| 2022-12-09 10:00 | 53.6 | 20.4 | 6.7 | - | 22.8 | 18.7 |
| 2022-12-09 09:00 | 53.7 | 19.6 | 6.1 | - | 16.5 | 13.4 |
| 2022-12-09 08:00 | 46.4 | 24.9 | 5.1 | - | 14.2 | 11.5 |
| 2022-12-09 07:00 | 43.0 | 23.8 | 5.1 | - | 15.9 | 13.4 |
| 2022-12-09 06:00 | 31.5 | 36.6 | 5.5 | - | 20.7 | 15.8 |
| 2022-12-09 05:00 | 39.6 | 32.3 | 6.1 | - | 21.7 | 15.4 |
| 2022-12-09 04:00 | 30.6 | 46.9 | 6.4 | - | 23.2 | 16.3 |
| 2022-12-09 03:00 | 54.1 | 33.0 | 7.8 | - | 23.8 | 15.2 |
| 2022-12-09 02:00 | - | 31.2 | - | - | 38.5 | 21.5 |
| 2022-12-09 01:00 | 76.8 | 22.2 | 6.6 | - | 47.0 | 24.0 |
| 2022-12-09 00:00 | 84.1 | 20.9 | 6.5 | - | 55.8 | 29.8 |
| 2022-12-08 23:00 | 87.0 | 29.2 | 5.4 | - | 52.6 | 29.7 |
| 2022-12-08 22:00 | 73.6 | 47.5 | 4.8 | - | 48.3 | 27.6 |
| 2022-12-08 21:00 | 74.0 | 65.4 | 5.4 | - | 55.9 | 33.8 |
| 2022-12-08 20:00 | 106.4 | 66.9 | 6.2 | - | 71.7 | 43.9 |
| 2022-12-08 19:00 | 103.2 | 100.5 | 7.6 | - | 69.1 | 42.6 |
| 2022-12-08 18:00 | 96.0 | 101.8 | 7.5 | - | 63.7 | 35.8 |
| 2022-12-08 17:00 | 80.9 | 92.0 | 8.0 | - | 42.5 | 24.4 |
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.