Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2022-09-27 09:0039.835.19.6424.418.514.1
2022-09-27 08:0034.834.29.4401.418.014.1
2022-09-27 07:0025.541.29.2362.320.514.8
2022-09-27 06:0012.556.78.6311.222.915.8
2022-09-27 05:009.365.48.6288.420.614.4
2022-09-27 04:007.970.28.6270.121.416.3
2022-09-27 03:007.467.98.6276.421.316.7
2022-09-27 02:008.972.49.1311.522.617.1
2022-09-27 01:0016.967.89.1329.324.418.9
2022-09-27 00:0024.163.78.7351.525.719.2
2022-09-26 23:0028.062.88.6383.726.118.2
2022-09-26 22:0027.168.58.7370.222.915.1
2022-09-26 21:0026.786.09.2378.731.623.7
2022-09-26 20:0048.174.09.1496.936.327.1
2022-09-26 19:0057.080.69.3523.239.028.5
2022-09-26 18:0064.591.79.7569.740.827.7
2022-09-26 17:0053.9116.39.4524.744.030.4
2022-09-26 16:0052.6154.09.7536.245.631.9
2022-09-26 15:0042.1142.39.7477.238.826.4
2022-09-26 14:0036.1139.210.0440.733.522.7
2022-09-26 13:0035.6126.310.0427.832.921.0
2022-09-26 12:0039.3105.69.6416.634.421.4
2022-09-26 11:0030.3115.710.0460.638.822.7
2022-09-26 10:0041.8101.110.0484.536.521.3
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: 09:07 27-09-2022