Welcome to Environmental Protection Department Air Quality Health Index Website


Eastern
Date TimeNO2O3SO2COPM10PM2.5
2021-10-22 04:0015.946.80.6-9.23.7
2021-10-22 03:0021.045.50.5-9.46.2
2021-10-22 02:0026.642.70.9-13.78.5
2021-10-22 01:0031.340.10.9-14.07.3
2021-10-22 00:0041.134.81.6-19.05.8
2021-10-21 23:0037.338.00.9-27.010.6
2021-10-21 22:0039.636.91.2-28.414.1
2021-10-21 21:0048.730.71.4-24.714.1
2021-10-21 20:0063.619.11.5-19.97.5
2021-10-21 19:0066.420.40.6-24.76.1
2021-10-21 18:0072.116.80.4-39.111.4
2021-10-21 17:0069.220.50.4-36.912.8
2021-10-21 16:0066.123.00.6-24.011.8
2021-10-21 15:0064.128.80.5-22.514.5
2021-10-21 14:0064.731.10.4-25.814.8
2021-10-21 13:0055.747.80.5-25.511.5
2021-10-21 12:0061.653.40.9-20.07.8
2021-10-21 11:0059.647.40.8-17.26.9
2021-10-21 10:0058.338.30.7-19.79.4
2021-10-21 09:0053.540.80.6-20.510.1
2021-10-21 08:0058.824.00.7-17.96.2
2021-10-21 07:0040.534.30.8-15.73.8
2021-10-21 06:0016.456.00.9-15.04.7
2021-10-21 05:0013.862.11.0-13.96.4
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: 04:07 22-10-2021