Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2022-10-07 00:0025.665.08.4448.118.210.8
2022-10-06 23:0025.969.58.7478.021.114.3
2022-10-06 22:0029.272.88.6508.022.515.7
2022-10-06 21:0033.269.78.5538.124.617.7
2022-10-06 20:0037.976.19.0539.426.018.8
2022-10-06 19:0047.069.99.3586.421.214.8
2022-10-06 18:0047.869.89.1536.220.714.8
2022-10-06 17:0038.366.78.6480.318.713.1
2022-10-06 16:0033.472.18.6446.419.313.1
2022-10-06 15:0039.268.38.7471.421.614.4
2022-10-06 14:0035.967.78.6444.020.715.3
2022-10-06 13:0030.072.18.7432.919.113.3
2022-10-06 12:0028.867.68.6427.219.313.8
2022-10-06 11:0025.665.48.6441.622.815.3
2022-10-06 10:0031.149.78.6456.819.012.4
2022-10-06 09:0034.943.58.9499.720.313.9
2022-10-06 08:0041.336.28.6565.721.514.8
2022-10-06 07:0030.645.48.7514.920.112.1
2022-10-06 06:0013.662.58.3442.923.014.7
2022-10-06 05:008.872.17.9378.422.513.4
2022-10-06 04:007.274.28.0359.721.911.6
2022-10-06 03:009.076.38.0369.021.010.5
2022-10-06 02:00----21.811.5
2022-10-06 01:00----21.711.6
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.

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Last revision date: 00:07 07-10-2022