Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2019-05-20 03:00 | 16.5 | 36.4 | 3.6 | - | 19.2 | 9.9 |
| 2019-05-20 02:00 | 19.2 | 32.1 | 3.8 | - | 20.3 | 10.4 |
| 2019-05-20 01:00 | 24.3 | 26.3 | 4.4 | - | 19.0 | 9.0 |
| 2019-05-20 00:00 | 13.8 | 38.3 | 3.1 | - | 19.9 | 9.8 |
| 2019-05-19 23:00 | 16.1 | 35.6 | 3.0 | - | 20.1 | 9.8 |
| 2019-05-19 22:00 | 18.3 | 34.4 | 2.8 | - | 20.9 | 11.0 |
| 2019-05-19 21:00 | 20.8 | 32.7 | 3.0 | - | 21.6 | 11.3 |
| 2019-05-19 20:00 | 13.6 | 41.5 | 2.2 | - | 21.4 | 10.9 |
| 2019-05-19 19:00 | 18.0 | 41.4 | 3.2 | - | 22.8 | 12.9 |
| 2019-05-19 18:00 | 17.4 | 48.0 | 3.7 | - | 22.2 | 12.3 |
| 2019-05-19 17:00 | 13.6 | 58.8 | 3.3 | - | 21.9 | 12.0 |
| 2019-05-19 16:00 | 11.0 | 65.3 | 2.7 | - | 24.3 | 14.0 |
| 2019-05-19 15:00 | 7.4 | 70.6 | 2.6 | - | 23.5 | 14.1 |
| 2019-05-19 14:00 | 5.4 | 73.8 | 2.4 | - | 24.5 | 14.8 |
| 2019-05-19 13:00 | 7.1 | 73.4 | 2.3 | - | 25.2 | 14.7 |
| 2019-05-19 12:00 | 6.3 | 76.4 | 2.6 | - | 27.3 | 16.3 |
| 2019-05-19 11:00 | 8.0 | 71.9 | 2.3 | - | 25.4 | 14.4 |
| 2019-05-19 10:00 | 7.4 | 69.1 | 2.3 | - | 26.2 | 15.4 |
| 2019-05-19 09:00 | 13.4 | 59.9 | 2.7 | - | 25.0 | 14.2 |
| 2019-05-19 08:00 | 11.2 | 59.1 | 2.7 | - | 22.9 | 12.6 |
| 2019-05-19 07:00 | 9.2 | 60.4 | 2.7 | - | 22.3 | 12.3 |
| 2019-05-19 06:00 | 22.3 | 44.8 | 4.5 | - | 24.0 | 14.3 |
| 2019-05-19 05:00 | 15.0 | 47.7 | 3.3 | - | 21.4 | 11.6 |
| 2019-05-19 04:00 | 19.2 | 42.0 | 3.7 | - | 19.3 | 9.5 |
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.
