Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2022-01-20 18:0055.181.03.2-32.320.7
2022-01-20 17:0045.889.23.5-33.322.1
2022-01-20 16:0043.888.43.3-30.320.3
2022-01-20 15:0038.394.63.1-26.418.0
2022-01-20 14:0030.995.43.2-21.514.8
2022-01-20 13:0030.394.02.9-26.218.2
2022-01-20 12:0033.785.12.2-26.717.8
2022-01-20 11:0037.074.22.1-26.816.5
2022-01-20 10:0046.354.82.2-27.217.5
2022-01-20 09:0047.448.32.4-26.517.6
2022-01-20 08:0035.056.02.4-25.217.7
2022-01-20 07:0021.775.42.4-23.015.4
2022-01-20 06:0016.381.12.3-23.916.6
2022-01-20 05:0020.278.82.1-19.614.4
2022-01-20 04:0038.541.32.2-14.710.5
2022-01-20 03:0032.046.81.9-15.711.3
2022-01-20 02:0039.042.51.5-12.57.6
2022-01-20 01:0042.044.21.9-16.211.7
2022-01-20 00:0048.6-2.5-22.315.2
2022-01-19 23:0056.749.62.3-28.117.0
2022-01-19 22:0062.358.92.0-33.222.6
2022-01-19 21:0069.072.53.8-38.026.0
2022-01-19 20:0058.2100.14.3-36.225.2
2022-01-19 19:0058.6101.14.3-29.721.1
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: 18:07 20-01-2022