Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2021-06-21 05:0010.667.97.1-22.311.3
2021-06-21 04:00-66.8--21.810.6
2021-06-21 03:004.766.46.0-22.811.8
2021-06-21 02:003.965.35.9-22.612.2
2021-06-21 01:005.763.45.6-23.413.3
2021-06-21 00:0017.456.45.6-23.813.3
2021-06-20 23:0019.058.05.6-23.212.5
2021-06-20 22:0013.966.55.6-22.111.9
2021-06-20 21:0010.762.85.6-23.913.4
2021-06-20 20:0011.860.15.6-21.911.9
2021-06-20 19:0014.858.25.9-18.89.6
2021-06-20 18:0012.060.96.0-20.211.2
2021-06-20 17:0012.071.76.0-20.210.1
2021-06-20 16:0010.375.85.9-21.511.6
2021-06-20 15:007.381.55.8-24.613.8
2021-06-20 14:0010.180.25.8-24.914.3
2021-06-20 13:0010.378.15.9-20.610.7
2021-06-20 12:009.475.85.9-18.27.8
2021-06-20 11:0010.175.16.3-18.78.5
2021-06-20 10:009.771.16.1-20.110.1
2021-06-20 09:009.066.55.9-19.810.1
2021-06-20 08:0014.157.85.8-19.29.7
2021-06-20 07:009.161.15.8-18.48.6
2021-06-20 06:007.163.95.9-17.46.8
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: 05:07 21-06-2021