Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-09-29 09:00 | 67.7 | 78.0 | 6.8 | - | 31.7 | 23.0 |
| 2021-09-29 08:00 | 39.4 | 85.4 | 5.2 | - | 30.5 | 22.6 |
| 2021-09-29 07:00 | 12.7 | 102.1 | 3.8 | - | 26.6 | 18.9 |
| 2021-09-29 06:00 | 9.2 | 107.9 | 3.9 | - | 28.6 | 20.9 |
| 2021-09-29 05:00 | 9.1 | 108.3 | 3.5 | - | 25.5 | 18.1 |
| 2021-09-29 04:00 | - | 96.7 | - | - | 24.8 | 16.3 |
| 2021-09-29 03:00 | 7.6 | 105.4 | 2.7 | - | 27.6 | 19.4 |
| 2021-09-29 02:00 | 19.2 | 96.6 | 3.9 | - | 28.5 | 20.4 |
| 2021-09-29 01:00 | 14.7 | 105.6 | 4.1 | - | 28.3 | 20.1 |
| 2021-09-29 00:00 | 17.6 | 109.4 | 4.3 | - | 27.7 | 18.8 |
| 2021-09-28 23:00 | 21.1 | 109.3 | 4.1 | - | 28.6 | 19.7 |
| 2021-09-28 22:00 | 23.2 | 117.5 | 4.9 | - | 30.4 | 21.1 |
| 2021-09-28 21:00 | 20.6 | 131.7 | 4.6 | - | 32.7 | 22.8 |
| 2021-09-28 20:00 | 64.9 | 95.2 | 13.1 | - | 33.7 | 23.2 |
| 2021-09-28 19:00 | 66.1 | 98.8 | 9.4 | - | 35.0 | 23.1 |
| 2021-09-28 18:00 | 71.3 | 97.5 | 9.0 | - | 38.6 | 25.5 |
| 2021-09-28 17:00 | 49.5 | 136.1 | 6.2 | - | 41.2 | 25.9 |
| 2021-09-28 16:00 | 38.2 | 151.7 | 4.2 | - | 38.8 | 24.9 |
| 2021-09-28 15:00 | 35.0 | 139.7 | 3.7 | - | 35.8 | 22.9 |
| 2021-09-28 14:00 | 37.0 | 134.1 | 3.5 | - | 35.8 | 23.8 |
| 2021-09-28 13:00 | 43.4 | 129.2 | 3.5 | - | 38.0 | 23.7 |
| 2021-09-28 12:00 | 52.7 | 95.2 | 3.7 | - | 43.4 | 26.2 |
| 2021-09-28 11:00 | 78.2 | 67.2 | 3.6 | - | 37.5 | 23.3 |
| 2021-09-28 10:00 | 60.3 | 83.0 | 2.8 | - | 34.6 | 20.8 |
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.
