Welcome to Environmental Protection Department Air Quality Health Index Website


North
Date TimeNO2O3SO2COPM10PM2.5
2023-02-05 18:0027.051.91.6668.521.7-
2023-02-05 17:0030.747.31.7749.021.0-
2023-02-05 16:0028.050.61.7858.331.220.7
2023-02-05 15:0026.250.31.2698.324.920.4
2023-02-05 14:0023.551.31.3669.920.418.5
2023-02-05 13:0021.650.71.3741.919.315.8
2023-02-05 12:0021.847.61.2755.217.114.8
2023-02-05 11:0018.752.31.1644.923.417.3
2023-02-05 10:0019.249.21.3646.626.619.2
2023-02-05 09:0023.442.81.4625.026.921.1
2023-02-05 08:0017.749.81.5653.632.325.3
2023-02-05 07:0020.644.71.5653.530.025.6
2023-02-05 06:0018.450.61.7698.822.4-
2023-02-05 05:0013.858.02.1658.428.327.1
2023-02-05 04:0014.160.02.1676.132.228.5
2023-02-05 03:0015.062.92.4722.731.2-
2023-02-05 02:0017.461.51.9677.938.329.3
2023-02-05 01:0016.867.11.9687.636.525.0
2023-02-05 00:0017.374.41.6656.526.224.7
2023-02-04 23:0016.278.71.5614.226.823.3
2023-02-04 22:0028.165.31.5647.525.020.7
2023-02-04 21:0031.063.21.5668.820.1-
2023-02-04 20:0036.358.91.7969.324.320.1
2023-02-04 19:0034.862.51.7704.323.318.1
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: 18:07 05-02-2023