Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2019-07-21 04:00 | 59.3 | 2.5 | 6.2 | - | 11.2 | 7.7 |
| 2019-07-21 03:00 | 54.2 | 9.3 | 5.3 | - | 17.2 | 10.4 |
| 2019-07-21 02:00 | 64.4 | 2.7 | 8.0 | - | 18.0 | 10.6 |
| 2019-07-21 01:00 | 65.4 | 2.6 | 7.4 | - | 17.4 | 12.0 |
| 2019-07-21 00:00 | 68.8 | 0.0 | 6.2 | - | 11.9 | 8.6 |
| 2019-07-20 23:00 | 64.8 | 3.0 | 5.1 | - | 11.4 | 7.5 |
| 2019-07-20 22:00 | 32.8 | 33.3 | 4.4 | - | 7.1 | 6.4 |
| 2019-07-20 21:00 | 34.7 | 34.5 | 6.9 | - | 9.0 | 7.7 |
| 2019-07-20 20:00 | 32.6 | 33.2 | 5.8 | - | 16.3 | 11.6 |
| 2019-07-20 19:00 | 71.1 | 6.3 | 6.0 | - | 14.3 | 9.2 |
| 2019-07-20 18:00 | 50.3 | 22.1 | 3.6 | - | 15.9 | 10.9 |
| 2019-07-20 17:00 | 83.4 | 5.9 | 6.0 | - | 25.8 | 17.8 |
| 2019-07-20 16:00 | 82.0 | 7.3 | 4.8 | - | 17.7 | 11.5 |
| 2019-07-20 15:00 | 73.2 | 13.6 | 3.5 | - | 12.5 | 9.3 |
| 2019-07-20 14:00 | 34.6 | 47.7 | 2.7 | - | 17.8 | 12.5 |
| 2019-07-20 13:00 | 13.8 | 53.5 | 2.6 | - | 20.0 | 11.4 |
| 2019-07-20 12:00 | 13.2 | 57.9 | 2.8 | - | 18.8 | 10.2 |
| 2019-07-20 11:00 | 13.9 | 54.7 | 2.8 | - | 20.5 | 12.2 |
| 2019-07-20 10:00 | 15.0 | 53.6 | 2.9 | - | 19.5 | 11.4 |
| 2019-07-20 09:00 | 10.1 | 58.8 | 2.9 | - | 19.0 | 10.9 |
| 2019-07-20 08:00 | 8.6 | 60.5 | 3.1 | - | 18.1 | 10.1 |
| 2019-07-20 07:00 | 6.4 | 58.8 | 3.1 | - | 16.3 | 9.5 |
| 2019-07-20 06:00 | 6.7 | 53.8 | 3.0 | - | 14.2 | 8.7 |
| 2019-07-20 05:00 | 4.3 | 54.2 | 3.9 | - | 15.5 | 9.8 |
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.
