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Causeway Bay
Date TimeNO2O3SO2COPM10PM2.5
2021-10-22 05:0021.633.70.8455.16.55.9
2021-10-22 04:0036.422.41.31,024.29.17.8
2021-10-22 03:0028.632.91.0753.83.83.0
2021-10-22 02:0042.625.01.8610.618.112.1
2021-10-22 01:0052.618.12.5822.124.416.5
2021-10-22 00:0061.314.83.3674.722.414.2
2021-10-21 23:0077.29.45.5790.324.915.3
2021-10-21 22:0078.68.75.8925.634.020.6
2021-10-21 21:0076.311.15.41,000.442.726.6
2021-10-21 20:0087.99.26.5861.635.720.5
2021-10-21 19:0081.88.85.7944.939.221.3
2021-10-21 18:0089.210.67.1859.039.121.9
2021-10-21 17:0095.96.77.2793.344.422.4
2021-10-21 16:0086.69.45.1790.062.635.8
2021-10-21 15:0097.28.17.2821.566.045.8
2021-10-21 14:00101.17.77.7834.054.134.3
2021-10-21 13:00107.27.76.9892.342.726.1
2021-10-21 12:00102.410.94.9661.051.227.7
2021-10-21 11:0083.410.86.7780.247.824.1
2021-10-21 10:0089.75.27.5806.941.822.5
2021-10-21 09:0083.85.27.6740.442.524.9
2021-10-21 08:0076.35.25.6706.133.919.9
2021-10-21 07:0065.25.64.0590.725.513.0
2021-10-21 06:0041.717.12.0459.717.710.4
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: 05:07 22-10-2021