Welcome to Environmental Protection Department Air Quality Health Index Website


Central
Date TimeNO2O3SO2COPM10PM2.5
2021-01-22 22:00124.41.99.11,164.473.955.3
2021-01-22 21:00122.22.58.61,121.157.944.1
2021-01-22 20:00120.03.08.01,005.942.730.6
2021-01-22 19:00125.15.38.9993.547.233.2
2021-01-22 18:00149.23.210.31,035.553.632.4
2021-01-22 17:00165.112.88.61,026.767.246.6
2021-01-22 16:00180.321.67.81,061.469.449.1
2021-01-22 15:00137.830.67.71,028.868.249.9
2021-01-22 14:00122.632.68.6940.473.555.0
2021-01-22 13:00121.334.210.11,019.392.871.2
2021-01-22 12:00133.618.112.11,111.3104.079.8
2021-01-22 11:00134.48.212.21,117.1103.577.9
2021-01-22 10:00135.51.713.51,319.099.372.3
2021-01-22 09:00124.50.014.91,264.3104.772.8
2021-01-22 08:00126.70.015.71,351.2107.078.6
2021-01-22 07:00122.30.013.71,366.899.774.0
2021-01-22 06:00113.00.011.81,192.395.172.1
2021-01-22 05:00105.20.09.31,165.698.074.1
2021-01-22 04:00106.10.010.21,136.5106.277.4
2021-01-22 03:00-0.0--128.387.1
2021-01-22 02:00126.70.010.31,211.6158.4110.2
2021-01-22 01:00164.02.011.11,267.1131.792.9
2021-01-22 00:00163.22.411.71,436.8104.273.5
2021-01-21 23:00154.62.610.71,630.091.663.0
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: 22:07 22-01-2021