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Causeway Bay
Date TimeNO2O3SO2COPM10PM2.5
2021-01-23 00:00113.77.211.41,416.898.667.6
2021-01-22 23:00115.77.09.51,161.495.965.8
2021-01-22 22:00117.07.49.81,335.492.961.9
2021-01-22 21:00118.37.49.61,344.673.849.3
2021-01-22 20:00127.98.111.91,674.773.449.5
2021-01-22 19:00125.711.911.41,630.882.152.4
2021-01-22 18:00142.39.312.31,361.883.651.5
2021-01-22 17:00156.911.011.51,331.494.362.6
2021-01-22 16:00157.416.210.61,420.286.057.8
2021-01-22 15:00154.518.911.01,222.580.854.8
2021-01-22 14:00152.822.311.41,401.695.167.8
2021-01-22 13:00148.016.912.61,345.4104.474.6
2021-01-22 12:00150.311.114.41,386.0117.083.4
2021-01-22 11:00146.08.815.61,651.1113.676.9
2021-01-22 10:00134.27.616.21,584.0118.078.1
2021-01-22 09:00122.96.716.11,497.8129.083.7
2021-01-22 08:00118.06.516.21,457.0122.084.2
2021-01-22 07:00109.97.212.31,424.5106.477.4
2021-01-22 06:00110.17.29.41,395.4100.070.2
2021-01-22 05:0099.17.08.81,247.3100.270.7
2021-01-22 04:00-6.8--125.988.2
2021-01-22 03:00111.66.88.51,250.1133.887.9
2021-01-22 02:00129.56.88.41,249.3156.3105.3
2021-01-22 01:00150.18.18.61,419.298.362.8
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.

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Last revision date: 00:07 23-01-2021