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Past 24 Hours Pollutant Concentration Summary

Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-03-23 05:006.843.61.8-11.28.5
2023-03-23 04:00-42.62.0-11.58.5
2023-03-23 03:0011.546.42.1-12.48.7
2023-03-23 02:00-46.0--10.67.6
2023-03-23 01:006.948.21.6-8.05.0
2023-03-23 00:006.2-1.6-9.86.5
2023-03-22 23:0011.440.21.6-9.66.2
2023-03-22 22:0012.935.91.7-10.06.2
2023-03-22 21:0011.238.81.4-12.57.7
2023-03-22 20:0013.841.02.2-13.96.8
2023-03-22 19:0013.144.51.7-15.78.7
2023-03-22 18:0014.741.61.6-12.46.7
2023-03-22 17:0015.743.11.7-13.17.5
2023-03-22 16:0023.636.92.4-14.19.1
2023-03-22 15:0018.738.32.0-15.38.4
2023-03-22 14:0024.030.64.6-12.56.5
2023-03-22 13:0021.032.44.0-12.26.6
2023-03-22 12:0015.538.73.6-12.27.0
2023-03-22 11:0022.934.05.7-9.44.6
2023-03-22 10:0013.443.9--11.67.5
2023-03-22 09:0017.338.73.8-7.54.6
2023-03-22 08:0013.839.73.8-5.42.9
2023-03-22 07:008.446.33.6-6.04.1
2023-03-22 06:004.351.13.5-5.33.7
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.