Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2022-01-20 18:00 | 55.1 | 81.0 | 3.2 | - | 32.3 | 20.7 |
| 2022-01-20 17:00 | 45.8 | 89.2 | 3.5 | - | 33.3 | 22.1 |
| 2022-01-20 16:00 | 43.8 | 88.4 | 3.3 | - | 30.3 | 20.3 |
| 2022-01-20 15:00 | 38.3 | 94.6 | 3.1 | - | 26.4 | 18.0 |
| 2022-01-20 14:00 | 30.9 | 95.4 | 3.2 | - | 21.5 | 14.8 |
| 2022-01-20 13:00 | 30.3 | 94.0 | 2.9 | - | 26.2 | 18.2 |
| 2022-01-20 12:00 | 33.7 | 85.1 | 2.2 | - | 26.7 | 17.8 |
| 2022-01-20 11:00 | 37.0 | 74.2 | 2.1 | - | 26.8 | 16.5 |
| 2022-01-20 10:00 | 46.3 | 54.8 | 2.2 | - | 27.2 | 17.5 |
| 2022-01-20 09:00 | 47.4 | 48.3 | 2.4 | - | 26.5 | 17.6 |
| 2022-01-20 08:00 | 35.0 | 56.0 | 2.4 | - | 25.2 | 17.7 |
| 2022-01-20 07:00 | 21.7 | 75.4 | 2.4 | - | 23.0 | 15.4 |
| 2022-01-20 06:00 | 16.3 | 81.1 | 2.3 | - | 23.9 | 16.6 |
| 2022-01-20 05:00 | 20.2 | 78.8 | 2.1 | - | 19.6 | 14.4 |
| 2022-01-20 04:00 | 38.5 | 41.3 | 2.2 | - | 14.7 | 10.5 |
| 2022-01-20 03:00 | 32.0 | 46.8 | 1.9 | - | 15.7 | 11.3 |
| 2022-01-20 02:00 | 39.0 | 42.5 | 1.5 | - | 12.5 | 7.6 |
| 2022-01-20 01:00 | 42.0 | 44.2 | 1.9 | - | 16.2 | 11.7 |
| 2022-01-20 00:00 | 48.6 | - | 2.5 | - | 22.3 | 15.2 |
| 2022-01-19 23:00 | 56.7 | 49.6 | 2.3 | - | 28.1 | 17.0 |
| 2022-01-19 22:00 | 62.3 | 58.9 | 2.0 | - | 33.2 | 22.6 |
| 2022-01-19 21:00 | 69.0 | 72.5 | 3.8 | - | 38.0 | 26.0 |
| 2022-01-19 20:00 | 58.2 | 100.1 | 4.3 | - | 36.2 | 25.2 |
| 2022-01-19 19:00 | 58.6 | 101.1 | 4.3 | - | 29.7 | 21.1 |
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.