Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-10-03 13:0029.0121.53.8-23.814.0
2023-10-03 12:0043.287.23.8-25.114.7
2023-10-03 11:0055.663.74.5-22.313.7
2023-10-03 10:0049.967.42.8-16.711.9
2023-10-03 09:0049.861.93.2-16.910.8
2023-10-03 08:0019.889.42.8-10.58.1
2023-10-03 07:008.9101.32.7-16.58.9
2023-10-03 06:004.4108.02.9-20.09.0
2023-10-03 05:004.2112.72.9-18.87.5
2023-10-03 04:004.4119.62.6-21.49.0
2023-10-03 03:009.1116.73.0-23.311.6
2023-10-03 02:009.1124.63.3-22.411.8
2023-10-03 01:00-122.6--20.010.3
2023-10-03 00:008.5123.12.8-18.610.3
2023-10-02 23:0011.5122.52.9-19.210.5
2023-10-02 22:0023.6116.62.9-21.412.6
2023-10-02 21:0015.8127.23.0-17.810.3
2023-10-02 20:0011.4136.02.7-16.410.2
2023-10-02 19:0015.3116.62.3-18.611.4
2023-10-02 18:0022.8107.72.3-18.510.1
2023-10-02 17:0023.9109.42.2-21.713.2
2023-10-02 16:0018.9115.02.2-22.213.2
2023-10-02 15:0022.8112.02.4-23.112.7
2023-10-02 14:0021.9112.72.3-23.612.6
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: 13:11 03-10-2023