Past 24 Hours Pollutant Concentration Summary
Southern
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-10-16 10:00 | 28.3 | 41.6 | 2.0 | 603.9 | 23.6 | 16.7 |
| 2021-10-16 09:00 | 24.2 | 35.8 | 1.8 | 601.7 | 20.9 | 14.2 |
| 2021-10-16 08:00 | 28.3 | 25.8 | 2.0 | 585.8 | 19.5 | 10.9 |
| 2021-10-16 07:00 | 19.1 | 37.0 | 1.6 | 472.2 | 21.9 | 9.7 |
| 2021-10-16 06:00 | 12.1 | 50.6 | 1.7 | 396.6 | 22.0 | 9.8 |
| 2021-10-16 05:00 | 9.9 | 55.4 | 1.8 | 392.8 | 21.2 | 11.5 |
| 2021-10-16 04:00 | 10.8 | 57.6 | 2.0 | 382.8 | 21.1 | 12.2 |
| 2021-10-16 03:00 | 9.3 | 60.9 | 2.1 | 353.5 | 21.9 | 6.7 |
| 2021-10-16 02:00 | 9.8 | 62.4 | 1.7 | 351.9 | 18.7 | 4.1 |
| 2021-10-16 01:00 | 13.6 | 57.0 | 1.3 | 374.6 | 16.3 | 9.1 |
| 2021-10-16 00:00 | 16.6 | 53.7 | 1.5 | 393.8 | 12.1 | 9.9 |
| 2021-10-15 23:00 | 28.0 | 36.7 | 1.8 | 472.9 | 7.2 | 6.9 |
| 2021-10-15 22:00 | 29.5 | 36.7 | 2.3 | 423.1 | 8.9 | 5.1 |
| 2021-10-15 21:00 | 28.2 | 38.4 | 1.9 | 429.8 | 14.9 | 7.3 |
| 2021-10-15 20:00 | 17.8 | 54.8 | 1.3 | 384.1 | 11.1 | 5.8 |
| 2021-10-15 19:00 | 13.2 | 54.7 | 1.2 | 383.0 | 6.7 | 3.7 |
| 2021-10-15 18:00 | 16.7 | 49.8 | 1.3 | 376.1 | 7.1 | 2.4 |
| 2021-10-15 17:00 | 17.9 | 48.3 | 1.5 | 366.6 | 5.3 | - |
| 2021-10-15 16:00 | 13.3 | 54.4 | 1.4 | 350.1 | 8.3 | 0.5 |
| 2021-10-15 15:00 | 19.5 | 49.1 | 1.2 | 373.6 | 1.5 | - |
| 2021-10-15 14:00 | 19.0 | 45.2 | 1.1 | 400.2 | - | - |
| 2021-10-15 13:00 | 19.3 | 44.7 | 1.7 | 416.7 | 9.7 | 3.3 |
| 2021-10-15 12:00 | 22.7 | 35.4 | 1.7 | 480.6 | 24.8 | 14.4 |
| 2021-10-15 11:00 | 23.6 | 33.9 | 2.2 | 564.9 | 27.7 | 18.1 |
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.