Past 24 Hours Pollutant Concentration Summary
Central
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-06-21 06:00 | 32.8 | 47.0 | 2.8 | 337.0 | 19.8 | 11.1 |
| 2021-06-21 05:00 | 39.7 | 39.0 | 2.9 | 379.5 | 22.6 | 13.5 |
| 2021-06-21 04:00 | 27.4 | 44.6 | 2.7 | 349.1 | 23.2 | 12.5 |
| 2021-06-21 03:00 | - | 44.2 | - | - | 22.7 | 13.3 |
| 2021-06-21 02:00 | 34.1 | 33.8 | 2.9 | 380.8 | 22.1 | 13.5 |
| 2021-06-21 01:00 | 23.3 | 42.9 | 2.7 | 297.7 | 23.3 | 13.7 |
| 2021-06-21 00:00 | 24.6 | 44.4 | 2.8 | 280.8 | 24.5 | 15.3 |
| 2021-06-20 23:00 | 23.8 | 48.1 | 2.7 | 301.3 | 24.3 | 14.0 |
| 2021-06-20 22:00 | 21.8 | 50.5 | 2.6 | 324.2 | 23.7 | 14.0 |
| 2021-06-20 21:00 | 28.3 | 40.9 | 2.7 | 371.5 | 23.6 | 15.0 |
| 2021-06-20 20:00 | 48.9 | 23.7 | 3.1 | 510.8 | 23.5 | 14.8 |
| 2021-06-20 19:00 | 43.1 | 31.6 | 3.0 | 470.3 | 21.0 | 11.3 |
| 2021-06-20 18:00 | 58.8 | 14.8 | 3.9 | 578.9 | 21.6 | 11.6 |
| 2021-06-20 17:00 | 46.8 | 36.4 | 3.2 | 359.3 | 21.3 | 12.2 |
| 2021-06-20 16:00 | 38.5 | 45.4 | 3.0 | 345.0 | 23.9 | 14.7 |
| 2021-06-20 15:00 | 40.5 | 45.6 | 3.1 | 377.4 | 24.4 | 14.6 |
| 2021-06-20 14:00 | 33.3 | 51.8 | 2.9 | 335.5 | 25.1 | 15.3 |
| 2021-06-20 13:00 | 39.4 | 43.3 | 3.4 | 416.2 | 22.8 | 12.6 |
| 2021-06-20 12:00 | 47.7 | 33.4 | 3.7 | 411.8 | 23.2 | 12.5 |
| 2021-06-20 11:00 | 63.5 | 26.3 | 3.9 | 469.5 | 24.7 | 13.6 |
| 2021-06-20 10:00 | 62.3 | 24.3 | 4.0 | 447.6 | 26.7 | 16.1 |
| 2021-06-20 09:00 | 48.5 | 30.1 | 3.4 | 418.6 | 20.4 | 11.3 |
| 2021-06-20 08:00 | 34.3 | 39.2 | 3.3 | 359.9 | 19.3 | 10.8 |
| 2021-06-20 07:00 | 26.3 | 44.0 | 3.0 | 328.5 | 21.3 | 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.