Causeway Bay
Date TimeNO2O3SO2COPM10PM2.5
2023-03-21 00:0054.9-4.4345.943.824.1
2023-03-20 23:0083.214.85.6501.048.525.8
2023-03-20 22:0084.620.15.4522.547.925.4
2023-03-20 21:0081.723.05.4642.055.331.1
2023-03-20 20:0075.929.75.9632.953.828.7
2023-03-20 19:0094.119.26.1566.447.524.0
2023-03-20 18:0083.628.45.0519.850.224.0
2023-03-20 17:0089.125.45.7485.557.631.0
2023-03-20 16:0086.628.34.8598.851.127.4
2023-03-20 15:0098.926.35.5520.752.328.8
2023-03-20 14:0091.928.05.0619.656.130.6
2023-03-20 13:0097.825.75.5611.756.129.9
2023-03-20 12:0085.728.34.6523.055.126.4
2023-03-20 11:0078.632.34.3459.058.331.0
2023-03-20 10:0076.730.83.9432.756.431.9
2023-03-20 09:0075.431.34.4437.544.825.1
2023-03-20 08:0078.528.15.0424.831.020.2
2023-03-20 07:0047.352.43.4400.024.916.4
2023-03-20 06:0027.972.53.0279.824.314.6
2023-03-20 05:0018.979.52.7224.618.112.6
2023-03-20 04:0011.689.92.5214.510.67.4
2023-03-20 03:0018.686.92.6237.314.010.1
2023-03-20 02:0021.583.12.7264.914.410.8
2023-03-20 01:0028.376.72.8292.915.911.6
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 21-03-2023