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Past 24 Hours Pollutant Concentration Summary

Central
Date TimeNO2O3SO2COPM10PM2.5
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
2024-05-20 15:0083.329.83.6458.317.614.0
2024-05-20 14:0067.943.73.2422.217.815.4
2024-05-20 13:0073.832.74.0550.714.211.2
2024-05-20 12:0075.223.14.0392.114.913.5
2024-05-20 11:0063.7-3.3441.016.010.5
2024-05-20 10:0060.627.63.0301.016.910.8
2024-05-20 09:0058.830.32.7273.814.16.8
2024-05-20 08:0048.042.32.2263.214.89.0
2024-05-20 07:0032.552.82.1186.615.29.7
2024-05-20 06:0022.662.72.1153.515.910.9
2024-05-20 05:0016.670.12.0154.512.39.1
2024-05-20 04:0016.271.92.0142.17.35.8
2024-05-20 03:00-68.7--9.57.9
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.