Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-05-30 02:00-53.0--28.318.7
2023-05-30 01:0041.548.25.0-25.117.4
2023-05-30 00:0035.263.74.5-26.218.3
2023-05-29 23:0024.9105.24.6-33.824.5
2023-05-29 22:0030.4118.94.9-30.521.6
2023-05-29 21:0025.3114.04.1-28.621.0
2023-05-29 20:0027.0114.14.3-29.720.9
2023-05-29 19:0028.2131.84.0-32.822.6
2023-05-29 18:0032.7143.54.0-31.720.7
2023-05-29 17:0031.5145.53.6-30.819.5
2023-05-29 16:0035.5128.73.9-26.714.7
2023-05-29 15:0032.6113.14.6-27.513.3
2023-05-29 14:0025.1110.54.4-27.816.1
2023-05-29 13:0031.993.05.3-26.215.5
2023-05-29 12:0032.787.24.8-26.917.9
2023-05-29 11:0037.570.64.4-28.317.1
2023-05-29 10:0044.950.64.3-27.816.9
2023-05-29 09:0049.642.55.2-25.915.1
2023-05-29 08:0044.242.43.1-25.214.5
2023-05-29 07:0027.456.22.7-25.214.1
2023-05-29 06:0014.968.22.8-22.410.9
2023-05-29 05:0011.974.03.1-22.510.1
2023-05-29 04:0013.280.03.5-20.610.8
2023-05-29 03:0017.577.63.2-17.712.2
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: 02:07 30-05-2023