Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2019-08-18 04:00 | 6.5 | 53.0 | 2.0 | - | 9.0 | 4.5 |
| 2019-08-18 03:00 | 4.7 | 53.8 | 2.2 | - | 8.7 | 4.1 |
| 2019-08-18 02:00 | 18.1 | 36.5 | 3.3 | - | 9.0 | 4.6 |
| 2019-08-18 01:00 | 18.8 | 33.1 | 3.2 | - | 8.2 | 5.2 |
| 2019-08-18 00:00 | 12.7 | 39.6 | 2.7 | - | 7.4 | 4.6 |
| 2019-08-17 23:00 | 27.9 | 22.8 | 4.7 | - | 8.7 | 6.4 |
| 2019-08-17 22:00 | 13.9 | 38.3 | 2.7 | - | 10.1 | 8.1 |
| 2019-08-17 21:00 | 46.1 | 13.4 | 12.1 | - | 11.0 | 9.1 |
| 2019-08-17 20:00 | 40.6 | 16.7 | 4.6 | - | 7.4 | 6.2 |
| 2019-08-17 19:00 | 32.2 | 24.1 | 2.1 | - | 5.3 | 4.4 |
| 2019-08-17 18:00 | 21.4 | 34.0 | 1.7 | - | 4.5 | 3.9 |
| 2019-08-17 17:00 | 18.5 | 39.2 | 1.8 | - | 9.8 | 7.8 |
| 2019-08-17 16:00 | 18.5 | 62.5 | 1.9 | - | 17.3 | 11.1 |
| 2019-08-17 15:00 | 53.7 | 31.7 | 2.4 | - | 18.8 | 10.3 |
| 2019-08-17 14:00 | 42.3 | 27.3 | 2.8 | - | 15.9 | 10.6 |
| 2019-08-17 13:00 | 60.5 | 10.5 | 2.5 | - | 8.2 | 6.0 |
| 2019-08-17 12:00 | 57.5 | 13.2 | 2.1 | - | 12.0 | 7.4 |
| 2019-08-17 11:00 | 35.1 | 38.4 | 3.1 | - | 18.1 | 10.2 |
| 2019-08-17 10:00 | 48.4 | 21.3 | 5.5 | - | 14.6 | 9.1 |
| 2019-08-17 09:00 | 28.0 | 32.0 | 2.1 | - | 11.8 | 6.7 |
| 2019-08-17 08:00 | 15.5 | 42.6 | 1.7 | - | 10.2 | 4.9 |
| 2019-08-17 07:00 | 15.5 | 38.5 | 1.8 | - | 10.7 | 4.6 |
| 2019-08-17 06:00 | 10.2 | 43.1 | 1.9 | - | 12.7 | 5.6 |
| 2019-08-17 05:00 | 11.3 | 40.8 | 2.2 | - | 12.8 | 6.6 |
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.
