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Past 24 Hours Pollutant Concentration Summary

Central
Date TimeNO2O3SO2COPM10PM2.5
2024-05-21 15:00101.510.44.6563.914.611.8
2024-05-21 14:0090.414.94.1494.020.616.2
2024-05-21 13:0077.520.13.3430.818.013.4
2024-05-21 12:0074.123.33.6493.111.38.9
2024-05-21 11:0081.717.24.1403.314.410.6
2024-05-21 10:0075.023.43.6366.018.612.3
2024-05-21 09:0079.516.43.7377.312.18.1
2024-05-21 08:0058.729.72.6284.610.06.2
2024-05-21 07:0042.338.42.3216.79.95.2
2024-05-21 06:0027.053.12.1199.67.32.5
2024-05-21 05:0023.360.32.1225.15.43.5
2024-05-21 04:0035.353.42.2249.15.42.4
2024-05-21 03:0034.154.92.1245.56.84.9
2024-05-21 02:0046.742.92.0256.04.43.8
2024-05-21 01:0052.741.12.0330.05.14.8
2024-05-21 00:0053.445.42.2338.04.64.1
2024-05-20 23:0064.038.02.5344.13.4-
2024-05-20 22:0053.247.42.2527.58.78.3
2024-05-20 21:0062.143.82.4423.815.214.6
2024-05-20 20:0069.637.43.0416.918.715.5
2024-05-20 19:0079.626.73.6408.921.517.0
2024-05-20 18:0089.725.83.7429.613.79.1
2024-05-20 17:0085.424.23.7401.615.311.2
2024-05-20 16:0086.217.44.5537.219.414.9
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.