Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2021-09-21 21:0075.71.46.9-16.311.4
2021-09-21 20:0078.52.16.8-18.910.6
2021-09-21 19:0080.92.37.2-14.07.3
2021-09-21 18:0075.95.77.5-18.911.4
2021-09-21 17:0079.89.16.2-19.911.5
2021-09-21 16:0072.610.78.3-14.07.2
2021-09-21 15:0054.018.56.3-8.15.5
2021-09-21 14:0033.438.62.8-6.95.3
2021-09-21 13:0022.743.03.2-10.36.5
2021-09-21 12:0040.313.56.0-14.88.4
2021-09-21 11:0041.66.66.0-13.39.2
2021-09-21 10:0039.37.55.5-11.18.2
2021-09-21 09:0034.77.75.4-11.88.8
2021-09-21 08:0035.65.96.9-11.37.8
2021-09-21 07:0037.91.99.6-11.38.3
2021-09-21 06:0043.31.09.9-10.57.8
2021-09-21 05:0044.71.19.3-8.55.9
2021-09-21 04:00-16.7--7.35.4
2021-09-21 03:0017.821.53.4-6.65.0
2021-09-21 02:0021.717.63.3-2.71.2
2021-09-21 01:0018.219.93.1-3.62.3
2021-09-21 00:0023.114.13.3-5.84.3
2021-09-20 23:0026.214.83.8-6.44.5
2021-09-20 22:0024.721.44.0-5.63.9
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: 21:07 21-09-2021