Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2024-05-03 13:0028.0101.51.9-35.613.2
2024-05-03 12:0034.587.81.8-37.814.2
2024-05-03 11:0041.079.22.0-35.712.2
2024-05-03 10:0033.980.21.7-30.511.4
2024-05-03 09:0031.583.51.6-20.29.6
2024-05-03 08:0027.387.91.7-21.811.4
2024-05-03 07:0014.199.81.7-25.111.2
2024-05-03 06:007.9112.21.6-23.19.6
2024-05-03 05:006.5116.61.6-27.511.7
2024-05-03 04:005.9120.11.5-26.911.4
2024-05-03 03:006.3120.11.7-27.611.1
2024-05-03 02:007.3118.71.6-29.611.7
2024-05-03 01:008.5120.61.6-20.79.8
2024-05-03 00:0010.3122.01.4-11.88.4
2024-05-02 23:0016.0115.01.5-15.510.1
2024-05-02 22:0022.5104.71.5-19.29.8
2024-05-02 21:0031.993.51.6-26.411.4
2024-05-02 20:0028.199.41.7-32.215.0
2024-05-02 19:0033.595.41.7-31.812.2
2024-05-02 18:0035.593.91.7-35.714.2
2024-05-02 17:0041.485.91.6-35.015.3
2024-05-02 16:0047.779.11.7-34.915.5
2024-05-02 15:0046.580.41.8-30.515.2
2024-05-02 14:0036.686.31.7-29.415.1
Remarks:

(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m3).

(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates

(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: 13:07 03-05-2024