Past 24 Hours Pollutant Concentration Summary
Central/Western
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2021-10-16 10:00 | 36.0 | 28.0 | 2.7 | - | 24.6 | 16.6 |
| 2021-10-16 09:00 | 32.1 | 23.9 | 2.4 | - | 21.7 | 14.3 |
| 2021-10-16 08:00 | 35.7 | 15.3 | 2.4 | - | 20.8 | 13.9 |
| 2021-10-16 07:00 | 30.5 | 19.9 | 2.2 | - | 20.9 | 12.8 |
| 2021-10-16 06:00 | 13.9 | 44.8 | 2.6 | - | 20.7 | 11.4 |
| 2021-10-16 05:00 | 9.9 | 52.9 | 2.5 | - | 18.2 | 10.0 |
| 2021-10-16 04:00 | 11.3 | 53.7 | 2.4 | - | 14.8 | 7.2 |
| 2021-10-16 03:00 | 9.7 | 56.4 | 2.5 | - | 15.2 | 7.0 |
| 2021-10-16 02:00 | 15.9 | 51.9 | 2.5 | - | 15.6 | 8.4 |
| 2021-10-16 01:00 | 22.9 | 43.6 | 2.3 | - | 13.2 | 8.6 |
| 2021-10-16 00:00 | 44.8 | 18.9 | 2.2 | - | 12.0 | 8.9 |
| 2021-10-15 23:00 | 42.3 | 14.8 | 2.3 | - | 9.8 | 7.6 |
| 2021-10-15 22:00 | 49.9 | 12.4 | 3.0 | - | 9.1 | 7.8 |
| 2021-10-15 21:00 | 46.7 | 16.9 | 2.8 | - | 8.0 | 6.8 |
| 2021-10-15 20:00 | 43.2 | 26.1 | 2.6 | - | 6.9 | 5.2 |
| 2021-10-15 19:00 | 45.7 | 20.9 | 2.5 | - | 6.8 | 5.5 |
| 2021-10-15 18:00 | 48.4 | 18.8 | 2.7 | - | 8.4 | 6.0 |
| 2021-10-15 17:00 | 37.5 | 30.2 | 2.7 | - | 8.6 | 5.3 |
| 2021-10-15 16:00 | 39.2 | 32.3 | 2.4 | - | 9.8 | 7.6 |
| 2021-10-15 15:00 | 35.7 | 35.6 | 2.9 | - | 7.4 | 5.8 |
| 2021-10-15 14:00 | 31.3 | 34.5 | 2.6 | - | 7.2 | 6.1 |
| 2021-10-15 13:00 | 38.0 | 28.5 | 3.0 | - | 8.7 | 7.2 |
| 2021-10-15 12:00 | 35.3 | 23.9 | 2.7 | - | 14.3 | 11.5 |
| 2021-10-15 11:00 | 40.4 | 18.3 | 4.1 | - | 21.4 | 17.0 |
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.