Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2017-10-17 15:00 | 31.9 | 68.1 | 5.0 | - | 25.8 | 16.3 |
| 2017-10-17 14:00 | 31.9 | 64.5 | 4.8 | - | 19.8 | 11.5 |
| 2017-10-17 13:00 | 29.4 | 56.0 | 4.7 | - | 18.2 | 10.0 |
| 2017-10-17 12:00 | 27.7 | 47.1 | 4.4 | - | 19.7 | 11.4 |
| 2017-10-17 11:00 | 31.0 | 31.7 | 4.5 | - | 20.7 | 12.3 |
| 2017-10-17 10:00 | 35.3 | 23.4 | 4.4 | - | 17.2 | 9.6 |
| 2017-10-17 09:00 | 33.9 | 22.9 | 4.2 | - | 17.2 | 9.4 |
| 2017-10-17 08:00 | 37.9 | 18.2 | 5.8 | - | 18.1 | 9.9 |
| 2017-10-17 07:00 | 19.8 | 33.3 | 4.9 | - | 15.5 | 7.4 |
| 2017-10-17 06:00 | 9.5 | 42.9 | 3.6 | - | 14.7 | 7.4 |
| 2017-10-17 05:00 | 7.6 | 45.3 | 3.8 | - | 10.0 | 4.3 |
| 2017-10-17 04:00 | 11.8 | 41.9 | 3.7 | - | 4.4 | 1.4 |
| 2017-10-17 03:00 | 17.4 | 35.9 | 3.7 | - | 3.1 | 1.8 |
| 2017-10-17 02:00 | 17.4 | 30.6 | 3.6 | - | 6.8 | 5.4 |
| 2017-10-17 01:00 | 22.8 | 23.2 | 3.8 | - | 12.0 | 9.0 |
| 2017-10-17 00:00 | 21.6 | 24.8 | 4.1 | - | 16.1 | 11.8 |
| 2017-10-16 23:00 | 23.3 | 28.9 | 4.4 | - | 14.1 | 9.3 |
| 2017-10-16 22:00 | 27.7 | 32.5 | 4.3 | - | 18.8 | 12.6 |
| 2017-10-16 21:00 | 30.2 | 37.0 | 6.2 | - | 20.9 | 14.3 |
| 2017-10-16 20:00 | 34.4 | 39.5 | 5.1 | - | 20.1 | 13.1 |
| 2017-10-16 19:00 | 41.0 | 39.2 | 4.7 | - | 18.5 | 10.7 |
| 2017-10-16 18:00 | 41.9 | 42.0 | 4.2 | - | 18.0 | 9.7 |
| 2017-10-16 17:00 | 40.5 | 48.3 | 4.2 | - | 22.2 | 13.0 |
| 2017-10-16 16:00 | 50.4 | 44.4 | 4.9 | - | 23.0 | 13.0 |
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.
