Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-09-23 12:0025.858.54.1-12.08.8
2023-09-23 11:0028.742.83.7-11.67.6
2023-09-23 10:0027.437.83.9-10.77.0
2023-09-23 09:0029.637.84.4-10.78.0
2023-09-23 08:0031.736.04.6-13.410.7
2023-09-23 07:0021.559.24.4-13.511.0
2023-09-23 06:0011.670.94.1-11.39.2
2023-09-23 05:0012.268.53.6-7.86.7
2023-09-23 04:0010.673.73.4-10.59.1
2023-09-23 03:0013.278.13.4-14.112.4
2023-09-23 02:0016.185.33.7-15.313.0
2023-09-23 01:00-93.1--16.814.1
2023-09-23 00:0025.889.53.3-16.413.5
2023-09-22 23:0029.587.33.3-16.713.5
2023-09-22 22:0041.673.63.6-17.113.8
2023-09-22 21:0048.267.13.3-18.114.6
2023-09-22 20:0037.685.73.2-14.411.3
2023-09-22 19:0020.1108.13.0-16.213.1
2023-09-22 18:0022.8116.33.4-18.313.5
2023-09-22 17:0041.598.13.4-20.313.3
2023-09-22 16:0036.1102.53.7-18.211.5
2023-09-22 15:0032.1100.73.6-13.99.3
2023-09-22 14:0033.197.73.9-16.212.1
2023-09-22 13:0046.273.54.7-17.311.8
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: 12:07 23-09-2023