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Past 24 Hours Pollutant Concentration Summary

Southern
Date TimeNO2O3SO2COPM10PM2.5
2024-05-21 15:0042.537.93.9410.915.64.1
2024-05-21 14:0021.361.53.7309.217.64.7
2024-05-21 13:0027.950.32.5341.623.94.9
2024-05-21 12:0029.345.22.4343.426.610.1
2024-05-21 11:0036.237.42.5349.920.511.6
2024-05-21 10:0030.843.42.7351.110.98.0
2024-05-21 09:0028.246.12.3342.811.14.4
2024-05-21 08:0034.838.42.3355.014.44.3
2024-05-21 07:0024.544.22.4331.212.36.2
2024-05-21 06:0013.854.92.3323.012.63.9
2024-05-21 05:009.863.12.2328.515.03.2
2024-05-21 04:009.966.52.5324.520.18.7
2024-05-21 03:007.769.52.1335.915.87.4
2024-05-21 02:009.767.62.2345.713.06.7
2024-05-21 01:0010.470.72.1351.516.87.3
2024-05-21 00:0012.072.62.2352.512.17.0
2024-05-20 23:0013.771.72.1361.93.9-
2024-05-20 22:0016.570.82.3354.47.00.8
2024-05-20 21:0022.564.82.3364.215.46.2
2024-05-20 20:0019.464.72.2359.818.512.2
2024-05-20 19:0013.770.72.5349.511.08.9
2024-05-20 18:0020.466.52.5356.76.33.9
2024-05-20 17:0031.450.72.9346.012.66.9
2024-05-20 16:0025.955.52.6355.619.27.4
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.