Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-06-15 05:00 | 3.3 | 54.1 | 4.8 | - | 11.6 | 6.2 |
| 2021-06-15 04:00 | - | 50.7 | - | - | 9.8 | 4.9 |
| 2021-06-15 03:00 | 8.3 | 48.5 | 4.3 | - | 9.7 | 4.7 |
| 2021-06-15 02:00 | 3.5 | 53.6 | 4.1 | - | 10.1 | 4.6 |
| 2021-06-15 01:00 | 11.0 | 46.7 | 4.2 | - | 12.0 | 5.8 |
| 2021-06-15 00:00 | 14.4 | 41.8 | 4.2 | - | 8.3 | 4.2 |
| 2021-06-14 23:00 | 10.8 | 46.0 | 4.1 | - | 9.5 | 4.4 |
| 2021-06-14 22:00 | 14.2 | 42.2 | 4.0 | - | 11.2 | 5.3 |
| 2021-06-14 21:00 | 10.4 | 47.1 | 4.0 | - | 14.0 | 7.4 |
| 2021-06-14 20:00 | 11.3 | 51.1 | 3.9 | - | 13.8 | 7.4 |
| 2021-06-14 19:00 | 9.8 | 51.1 | 4.0 | - | 13.5 | 7.2 |
| 2021-06-14 18:00 | 9.1 | 54.9 | 4.1 | - | 13.4 | 6.6 |
| 2021-06-14 17:00 | 10.9 | 52.9 | 4.1 | - | 12.9 | 6.8 |
| 2021-06-14 16:00 | 5.0 | 62.1 | 3.9 | - | 13.4 | 7.6 |
| 2021-06-14 15:00 | 6.7 | 63.1 | 4.0 | - | 12.5 | 6.5 |
| 2021-06-14 14:00 | 7.8 | 63.8 | 4.0 | - | 12.5 | 6.6 |
| 2021-06-14 13:00 | 7.5 | 62.7 | 4.0 | - | 13.0 | 7.1 |
| 2021-06-14 12:00 | 11.2 | 53.5 | 4.8 | - | 11.0 | 5.0 |
| 2021-06-14 11:00 | 12.3 | 51.7 | 4.6 | - | 11.3 | 5.7 |
| 2021-06-14 10:00 | 16.9 | 43.1 | 5.4 | - | 10.3 | 4.4 |
| 2021-06-14 09:00 | 21.0 | 32.1 | 5.5 | - | 8.7 | 3.0 |
| 2021-06-14 08:00 | 12.2 | 37.5 | 4.1 | - | 9.2 | 4.0 |
| 2021-06-14 07:00 | 13.0 | 35.0 | 4.0 | - | 4.6 | 0.8 |
| 2021-06-14 06:00 | 11.2 | 34.4 | 4.1 | - | 8.4 | 3.9 |
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.