Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2021-12-04 08:0063.120.15.5682.018.814.3
2021-12-04 07:0062.924.55.6679.414.510.4
2021-12-04 06:0041.336.45.3612.113.18.8
2021-12-04 05:0025.056.35.8558.312.48.2
2021-12-04 04:0022.663.46.5562.915.510.4
2021-12-04 03:0027.759.56.9585.619.713.8
2021-12-04 02:0047.237.27.4656.615.17.3
2021-12-04 01:00----13.65.0
2021-12-04 00:0079.515.46.6772.514.56.5
2021-12-03 23:0075.422.15.6741.016.311.2
2021-12-03 22:0074.124.65.3763.518.47.8
2021-12-03 21:0071.127.95.0735.624.713.1
2021-12-03 20:0083.318.15.3798.726.911.7
2021-12-03 19:0087.716.35.3761.329.510.1
2021-12-03 18:0058.951.35.3625.727.85.9
2021-12-03 17:0055.864.65.4595.725.16.3
2021-12-03 16:0049.968.75.6596.323.77.0
2021-12-03 15:0039.177.45.3569.529.79.1
2021-12-03 14:0041.382.15.7571.833.413.5
2021-12-03 13:0053.065.25.7629.4--
2021-12-03 12:0047.757.55.9609.5--
2021-12-03 11:0040.356.25.6580.4--
2021-12-03 10:0046.046.95.8652.420.05.8
2021-12-03 09:0047.243.86.3626.422.613.3
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: 08:07 04-12-2021