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Past 24 Hours Pollutant Concentration Summary

Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2019-07-21 04:0059.32.56.2-11.27.7
2019-07-21 03:0054.29.35.3-17.210.4
2019-07-21 02:0064.42.78.0-18.010.6
2019-07-21 01:0065.42.67.4-17.412.0
2019-07-21 00:0068.80.06.2-11.98.6
2019-07-20 23:0064.83.05.1-11.47.5
2019-07-20 22:0032.833.34.4-7.16.4
2019-07-20 21:0034.734.56.9-9.07.7
2019-07-20 20:0032.633.25.8-16.311.6
2019-07-20 19:0071.16.36.0-14.39.2
2019-07-20 18:0050.322.13.6-15.910.9
2019-07-20 17:0083.45.96.0-25.817.8
2019-07-20 16:0082.07.34.8-17.711.5
2019-07-20 15:0073.213.63.5-12.59.3
2019-07-20 14:0034.647.72.7-17.812.5
2019-07-20 13:0013.853.52.6-20.011.4
2019-07-20 12:0013.257.92.8-18.810.2
2019-07-20 11:0013.954.72.8-20.512.2
2019-07-20 10:0015.053.62.9-19.511.4
2019-07-20 09:0010.158.82.9-19.010.9
2019-07-20 08:008.660.53.1-18.110.1
2019-07-20 07:006.458.83.1-16.39.5
2019-07-20 06:006.753.83.0-14.28.7
2019-07-20 05:004.354.23.9-15.59.8
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.