Welcome to Environmental Protection Department Air Quality Health Index Website


Kwai Chung
Date TimeNO2O3SO2COPM10PM2.5
2021-10-22 04:00----4.3-
2021-10-22 03:0011.443.91.2-6.36.1
2021-10-22 02:0014.543.41.4-7.35.5
2021-10-22 01:0019.341.41.5-9.45.7
2021-10-22 00:0018.444.41.6-10.97.5
2021-10-21 23:0018.147.81.4-11.06.7
2021-10-21 22:0027.044.71.7-11.15.7
2021-10-21 21:0025.746.12.0-12.46.4
2021-10-21 20:0032.343.82.5-15.99.3
2021-10-21 19:0038.839.42.1-18.810.5
2021-10-21 18:0033.838.32.1-23.511.9
2021-10-21 17:0046.829.42.3-29.913.4
2021-10-21 16:0067.017.83.4-32.714.5
2021-10-21 15:0058.426.23.0-35.416.6
2021-10-21 14:0045.239.62.3-33.317.7
2021-10-21 13:0068.418.34.7-26.615.6
2021-10-21 12:0081.510.18.2-20.712.1
2021-10-21 11:0066.015.83.5-17.411.2
2021-10-21 10:0058.717.53.7-16.510.5
2021-10-21 09:0047.124.02.9-18.111.5
2021-10-21 08:0070.00.83.4-17.611.5
2021-10-21 07:0056.15.02.4-14.29.2
2021-10-21 06:0037.312.91.9-13.07.7
2021-10-21 05:0025.326.12.0-14.58.7
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 22-10-2021