Welcome to Environmental Protection Department Air Quality Health Index Website


Kwai Chung
Date TimeNO2O3SO2COPM10PM2.5
2024-05-29 00:0017.1110.31.6-16.36.1
2024-05-28 23:0022.4105.01.6-15.55.1
2024-05-28 22:0023.897.42.0-18.29.4
2024-05-28 21:0032.084.62.2-8.86.2
2024-05-28 20:0041.874.92.8-10.47.1
2024-05-28 19:00105.329.46.5-16.512.5
2024-05-28 18:0087.840.23.9-8.36.4
2024-05-28 17:0066.653.73.0-15.711.5
2024-05-28 16:0063.359.32.7-12.59.9
2024-05-28 15:0036.786.82.4-10.99.1
2024-05-28 14:0053.785.62.7-10.88.9
2024-05-28 13:0052.677.93.0-11.59.3
2024-05-28 12:0043.158.73.1-12.510.7
2024-05-28 11:0053.322.95.6-19.114.3
2024-05-28 10:0072.27.88.3-19.914.7
2024-05-28 09:0074.15.98.7-17.411.9
2024-05-28 08:0064.86.56.3-15.610.3
2024-05-28 07:0051.48.33.9-13.18.2
2024-05-28 06:0043.712.93.4-13.27.1
2024-05-28 05:0065.85.14.2-10.87.4
2024-05-28 04:0065.05.83.3-11.39.3
2024-05-28 03:0062.27.54.0-12.17.6
2024-05-28 02:0035.623.22.9-13.46.1
2024-05-28 01:0050.915.48.1-16.310.7
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: 00:07 29-05-2024