Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2019-02-22 20:00 | 124.1 | 29.0 | 4.5 | - | 51.2 | 39.4 |
| 2019-02-22 19:00 | 75.3 | 65.9 | 3.9 | - | 37.7 | 27.5 |
| 2019-02-22 18:00 | 84.8 | 50.9 | 3.8 | - | 41.0 | 30.0 |
| 2019-02-22 17:00 | 87.1 | 30.6 | 4.9 | - | 40.1 | 27.7 |
| 2019-02-22 16:00 | 74.5 | 34.0 | 3.6 | - | 42.5 | 28.1 |
| 2019-02-22 15:00 | 72.1 | 23.6 | 3.5 | - | 47.6 | 30.7 |
| 2019-02-22 14:00 | 63.7 | 19.0 | 3.7 | - | 39.5 | 26.3 |
| 2019-02-22 13:00 | 49.5 | 17.4 | 3.5 | - | 31.9 | 21.5 |
| 2019-02-22 12:00 | 40.0 | 10.4 | 3.8 | - | 27.2 | 18.5 |
| 2019-02-22 11:00 | 32.6 | 6.5 | 3.9 | - | 26.2 | 18.6 |
| 2019-02-22 10:00 | 31.6 | 4.4 | 4.2 | - | 26.6 | 20.1 |
| 2019-02-22 09:00 | 32.7 | 3.0 | 4.3 | - | 23.3 | 17.3 |
| 2019-02-22 08:00 | 34.2 | 2.5 | 4.6 | - | 24.0 | 19.1 |
| 2019-02-22 07:00 | 32.5 | 2.0 | 3.7 | - | 19.7 | 15.8 |
| 2019-02-22 06:00 | 34.6 | 1.7 | 3.6 | - | 18.8 | 14.6 |
| 2019-02-22 05:00 | 36.1 | 1.8 | 3.9 | - | 18.1 | 14.1 |
| 2019-02-22 04:00 | 38.7 | 1.3 | 4.5 | - | 12.4 | 10.8 |
| 2019-02-22 03:00 | 42.5 | 1.9 | 4.6 | - | 16.1 | 13.1 |
| 2019-02-22 02:00 | 46.0 | 2.0 | 4.5 | - | 22.3 | 15.4 |
| 2019-02-22 01:00 | 52.0 | 4.5 | 3.1 | - | 40.7 | 25.3 |
| 2019-02-22 00:00 | 58.8 | 11.3 | 1.7 | - | 44.2 | 27.4 |
| 2019-02-21 23:00 | 68.8 | 8.2 | 1.6 | - | 36.9 | 24.2 |
| 2019-02-21 22:00 | 63.4 | 17.3 | 1.7 | - | 35.8 | 25.1 |
| 2019-02-21 21:00 | 70.7 | 16.8 | 1.6 | - | 36.3 | 26.5 |
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.
