Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2023-02-08 04:008.369.77.4431.05.04.2
2023-02-08 03:008.671.67.4467.62.92.3
2023-02-08 02:0012.167.97.7484.96.65.6
2023-02-08 01:0021.457.87.7486.817.215.3
2023-02-08 00:0027.051.97.9498.826.723.9
2023-02-07 23:0036.347.38.2547.823.219.4
2023-02-07 22:0058.417.110.3609.220.314.8
2023-02-07 21:0064.41.612.8681.033.123.0
2023-02-07 20:0097.12.420.5755.640.427.8
2023-02-07 19:0092.31.817.0711.325.915.3
2023-02-07 18:0084.82.714.0547.612.65.9
2023-02-07 17:0061.022.610.3450.022.914.3
2023-02-07 16:0067.217.312.5480.630.721.2
2023-02-07 15:0076.810.015.5557.328.614.1
2023-02-07 14:0088.64.721.7672.935.419.5
2023-02-07 13:0089.33.923.1728.661.846.4
2023-02-07 12:0087.53.224.1875.341.129.1
2023-02-07 11:0079.62.921.6843.030.920.7
2023-02-07 10:0071.62.322.8728.820.211.1
2023-02-07 09:0063.12.315.1724.09.99.3
2023-02-07 08:0040.55.38.9612.69.07.8
2023-02-07 07:0036.111.910.0482.811.57.1
2023-02-07 06:0058.04.212.3534.514.512.6
2023-02-07 05:0031.823.59.2468.512.97.5
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: 04:07 08-02-2023