Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2021-01-26 03:0019.8104.04.1-36.425.6
2021-01-26 02:0025.597.14.0-37.627.1
2021-01-26 01:0044.976.74.0-40.129.9
2021-01-26 00:0090.637.24.5-42.931.8
2021-01-25 23:0097.738.75.6-47.335.3
2021-01-25 22:00149.32.38.4-47.134.2
2021-01-25 21:00150.96.67.5-44.830.3
2021-01-25 20:00139.014.95.4-42.128.3
2021-01-25 19:0091.455.04.4-38.225.4
2021-01-25 18:0084.967.64.6-36.123.0
2021-01-25 17:0083.961.04.0-34.620.9
2021-01-25 16:0061.875.63.1-30.918.8
2021-01-25 15:0039.295.02.9-34.323.6
2021-01-25 14:0035.2100.63.5-34.523.2
2021-01-25 13:0034.299.34.0-37.625.0
2021-01-25 12:0036.192.83.5-40.427.4
2021-01-25 11:0038.882.63.4-44.630.0
2021-01-25 10:0046.469.63.1-38.025.4
2021-01-25 09:0046.766.93.4-38.026.4
2021-01-25 08:0031.978.33.7-38.426.9
2021-01-25 07:0018.189.53.9-38.025.8
2021-01-25 06:0013.296.24.0-37.126.6
2021-01-25 05:0012.1100.74.0-36.125.8
2021-01-25 04:0012.799.24.0-36.525.4
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: 03:07 26-01-2021