Causeway Bay
Date TimeNO2O3SO2COPM10PM2.5
2024-05-21 15:0074.217.53.1780.535.223.3
2024-05-21 14:0059.533.62.1405.028.119.5
2024-05-21 13:0062.431.82.4452.531.222.5
2024-05-21 12:0065.127.32.2377.429.219.1
2024-05-21 11:0067.222.02.3440.436.716.7
2024-05-21 10:0066.024.72.5399.528.813.0
2024-05-21 09:0052.631.12.3358.019.011.0
2024-05-21 08:0050.134.31.9309.518.212.3
2024-05-21 07:0038.145.01.6273.220.514.7
2024-05-21 06:0017.361.31.3253.418.611.7
2024-05-21 05:0017.365.11.2283.212.27.2
2024-05-21 04:0020.365.91.3291.76.32.3
2024-05-21 03:0016.768.31.2319.23.92.1
2024-05-21 02:0021.664.41.3331.39.9-
2024-05-21 01:0021.868.21.3305.820.419.4
2024-05-21 00:0024.2-1.2303.621.719.5
2024-05-20 23:0025.568.21.3308.324.522.0
2024-05-20 22:0054.248.11.9420.623.620.3
2024-05-20 21:0040.260.41.4438.323.618.7
2024-05-20 20:0031.461.61.4442.122.516.1
2024-05-20 19:0048.946.61.8468.823.416.1
2024-05-20 18:0055.248.22.0469.524.017.1
2024-05-20 17:0059.940.22.0442.023.317.4
2024-05-20 16:0074.625.63.1544.226.120.1
Remarks:

(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m3).

(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates

(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: 15:07 21-05-2024