Central
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-10-22 05:00 | 32.2 | 27.5 | 1.0 | 1,023.1 | 5.3 | 5.3 |
| 2021-10-22 04:00 | 31.3 | 33.1 | 0.8 | 1,032.9 | 6.7 | 6.2 |
| 2021-10-22 03:00 | 28.1 | 36.1 | 0.7 | 1,018.2 | 8.9 | 6.9 |
| 2021-10-22 02:00 | 38.1 | 28.4 | 1.1 | 1,064.6 | 12.0 | 7.5 |
| 2021-10-22 01:00 | 48.3 | 21.4 | 1.5 | 1,069.4 | 15.8 | 8.3 |
| 2021-10-22 00:00 | 57.8 | 17.6 | - | 1,093.1 | 18.2 | 10.3 |
| 2021-10-21 23:00 | 68.5 | 12.3 | 3.0 | 1,142.1 | 21.7 | 13.1 |
| 2021-10-21 22:00 | 74.9 | 10.4 | 3.3 | 1,198.3 | 23.0 | 12.7 |
| 2021-10-21 21:00 | 71.2 | 9.5 | 3.6 | 1,233.0 | 24.8 | 14.1 |
| 2021-10-21 20:00 | 89.5 | 5.3 | 5.8 | 1,262.8 | 24.4 | 13.7 |
| 2021-10-21 19:00 | 94.0 | 4.4 | 7.3 | 1,308.5 | 31.2 | 18.3 |
| 2021-10-21 18:00 | 90.3 | 3.4 | 6.2 | 1,363.6 | 31.3 | 18.0 |
| 2021-10-21 17:00 | 92.6 | 3.4 | 5.4 | 1,286.2 | 37.0 | 19.4 |
| 2021-10-21 16:00 | 92.9 | 4.2 | 4.6 | 1,290.1 | 47.6 | 24.9 |
| 2021-10-21 15:00 | 102.5 | 4.6 | 6.4 | 1,317.4 | 36.6 | 19.7 |
| 2021-10-21 14:00 | 87.0 | 10.9 | - | 1,349.2 | 45.8 | 27.9 |
| 2021-10-21 13:00 | 98.5 | 8.3 | - | 1,529.6 | 33.7 | 20.7 |
| 2021-10-21 12:00 | 88.6 | 13.9 | - | 1,362.2 | 27.9 | 13.8 |
| 2021-10-21 11:00 | 95.1 | 2.9 | - | 1,299.3 | 29.9 | 16.7 |
| 2021-10-21 10:00 | 100.9 | 2.7 | - | 1,388.0 | 36.8 | 22.8 |
| 2021-10-21 09:00 | 103.7 | 2.1 | 10.3 | 1,307.9 | 22.2 | 10.3 |
| 2021-10-21 08:00 | 80.3 | 3.7 | 5.0 | 1,242.4 | 16.9 | 8.5 |
| 2021-10-21 07:00 | 61.2 | 4.8 | 4.1 | 1,104.3 | 14.2 | 7.9 |
| 2021-10-21 06:00 | 46.4 | 16.5 | 3.3 | 1,057.8 | 15.3 | 10.4 |
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.
