Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2024-05-28 06:0056.73.83.9615.19.75.9
2024-05-28 05:0062.22.34.1498.89.76.2
2024-05-28 04:0059.45.13.2465.27.95.1
2024-05-28 03:0056.27.02.9508.611.46.6
2024-05-28 02:0044.917.23.8541.010.25.9
2024-05-28 01:00----16.110.4
2024-05-28 00:0042.97.73.3327.916.39.8
2024-05-27 23:0050.03.43.9426.517.511.0
2024-05-27 22:0056.70.64.9422.116.110.6
2024-05-27 21:0047.68.03.4382.117.712.0
2024-05-27 20:0057.73.24.4395.524.611.5
2024-05-27 19:0058.44.74.0416.222.09.3
2024-05-27 18:0047.315.03.2366.522.26.8
2024-05-27 17:0053.513.93.8387.629.07.9
2024-05-27 16:0036.526.43.0310.820.26.0
2024-05-27 15:0043.921.43.6321.719.013.5
2024-05-27 14:0029.620.33.1342.018.415.0
2024-05-27 13:0033.415.53.2340.114.811.0
2024-05-27 12:0032.615.22.9328.916.411.5
2024-05-27 11:0035.411.13.2309.918.412.9
2024-05-27 10:0037.39.13.1333.417.715.2
2024-05-27 09:0039.66.53.4355.018.616.3
2024-05-27 08:0038.64.33.8347.913.511.8
2024-05-27 07:0035.64.44.0252.111.910.8
Remarks:

(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m3).

(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates

(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.

(5) Owing to maintenance works, the operation of Eastern Air Quality Monitoring Station will be temporarily suspended.  We apologize for any inconvenience caused.

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Last revision date: 06:07 28-05-2024