Past 24 Hours Pollutant Concentration Summary
Tsuen Wan
| Date Time | NO2 | O3 | SO2 | CO | PM10 | PM2.5 |
|---|---|---|---|---|---|---|
| 2022-01-23 02:00 | 19.5 | 54.4 | 5.0 | 651.4 | 2.3 | 1.2 |
| 2022-01-23 01:00 | - | - | - | - | 0.3 | 0.0 |
| 2022-01-23 00:00 | 26.3 | 50.6 | 4.0 | 713.5 | 0.1 | - |
| 2022-01-22 23:00 | 26.9 | 49.7 | 3.6 | 758.3 | 3.9 | - |
| 2022-01-22 22:00 | 28.5 | 47.8 | 4.1 | 762.6 | 1.9 | 0.8 |
| 2022-01-22 21:00 | 33.2 | 46.0 | 3.9 | 775.0 | 5.9 | 5.5 |
| 2022-01-22 20:00 | 41.6 | 42.4 | 4.2 | 802.7 | 5.7 | 5.4 |
| 2022-01-22 19:00 | 52.3 | 31.3 | 4.4 | 837.9 | 0.3 | 0.0 |
| 2022-01-22 18:00 | 65.6 | 22.8 | 4.7 | 909.7 | 0.7 | 0.1 |
| 2022-01-22 17:00 | 54.0 | 28.7 | 4.4 | 846.9 | 3.2 | - |
| 2022-01-22 16:00 | 42.6 | 34.0 | 4.3 | 801.2 | 0.1 | 0.0 |
| 2022-01-22 15:00 | 38.2 | 42.4 | 4.3 | 792.4 | 0.5 | 0.4 |
| 2022-01-22 14:00 | 41.9 | 32.9 | 4.3 | 854.3 | 2.1 | 1.8 |
| 2022-01-22 13:00 | 43.1 | 31.8 | 4.3 | 831.1 | 0.5 | - |
| 2022-01-22 12:00 | 40.6 | 31.9 | 4.3 | 839.2 | 1.8 | - |
| 2022-01-22 11:00 | 39.9 | 29.4 | 4.1 | 848.9 | 3.2 | - |
| 2022-01-22 10:00 | 43.0 | 22.5 | 4.3 | 878.1 | 6.0 | 4.7 |
| 2022-01-22 09:00 | 46.0 | 18.5 | 4.4 | 855.5 | 7.2 | 6.9 |
| 2022-01-22 08:00 | 43.6 | 21.4 | 4.4 | 855.8 | 7.4 | 6.1 |
| 2022-01-22 07:00 | 36.1 | 29.1 | 4.3 | 817.8 | 12.9 | 11.8 |
| 2022-01-22 06:00 | 32.8 | 34.4 | 4.4 | 750.6 | 5.8 | 5.4 |
| 2022-01-22 05:00 | 14.1 | 51.7 | 3.8 | 696.5 | 6.8 | - |
| 2022-01-22 04:00 | 10.8 | 59.2 | 3.9 | 693.0 | 2.6 | 2.2 |
| 2022-01-22 03:00 | 11.3 | 62.4 | 3.8 | 694.8 | 5.5 | 4.8 |
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.