EPD

Back Home

Past 24 Hours Pollutant Concentration Summary

Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-09-23 05:0012.268.53.6-7.86.7
2023-09-23 04:0010.673.73.4-10.59.1
2023-09-23 03:0013.278.13.4-14.112.4
2023-09-23 02:0016.185.33.7-15.313.0
2023-09-23 01:00-93.1--16.814.1
2023-09-23 00:0025.889.53.3-16.413.5
2023-09-22 23:0029.587.33.3-16.713.5
2023-09-22 22:0041.673.63.6-17.113.8
2023-09-22 21:0048.267.13.3-18.114.6
2023-09-22 20:0037.685.73.2-14.411.3
2023-09-22 19:0020.1108.13.0-16.213.1
2023-09-22 18:0022.8116.33.4-18.313.5
2023-09-22 17:0041.598.13.4-20.313.3
2023-09-22 16:0036.1102.53.7-18.211.5
2023-09-22 15:0032.1100.73.6-13.99.3
2023-09-22 14:0033.197.73.9-16.212.1
2023-09-22 13:0046.273.54.7-17.311.8
2023-09-22 12:0050.348.85.5-21.113.5
2023-09-22 11:0069.828.88.0-20.212.4
2023-09-22 10:0075.318.58.3-18.913.4
2023-09-22 09:0068.628.010.8-16.011.9
2023-09-22 08:0052.136.07.6-14.610.3
2023-09-22 07:0041.946.24.8-18.414.0
2023-09-22 06:0035.758.04.5-16.012.0
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.