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Past 24 Hours Pollutant Concentration Summary

Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2024-04-23 03:0017.863.26.0314.118.013.9
2024-04-23 02:0053.637.58.2355.324.018.8
2024-04-23 01:0054.623.47.8429.721.315.6
2024-04-23 00:0057.121.47.4479.921.716.1
2024-04-22 23:0073.321.38.9510.619.114.3
2024-04-22 22:0053.827.66.5436.322.217.6
2024-04-22 21:0066.425.77.1427.221.116.0
2024-04-22 20:0074.224.98.0431.819.815.3
2024-04-22 19:0082.822.98.3426.118.314.7
2024-04-22 18:0083.924.19.8432.217.014.6
2024-04-22 17:0073.829.49.0403.112.09.2
2024-04-22 16:0060.140.86.5379.216.613.3
2024-04-22 15:0080.723.29.5419.921.714.1
2024-04-22 14:0081.922.811.1387.731.520.0
2024-04-22 13:0083.124.012.1406.723.115.0
2024-04-22 12:0075.726.39.4521.022.515.8
2024-04-22 11:0073.028.611.3445.120.115.8
2024-04-22 10:0068.734.37.5546.713.810.2
2024-04-22 09:0046.733.46.4489.013.410.1
2024-04-22 08:0045.535.36.0459.714.110.8
2024-04-22 07:0035.249.15.4396.314.210.7
2024-04-22 06:0022.063.35.5306.611.88.8
2024-04-22 05:0018.656.35.6331.612.38.2
2024-04-22 04:0017.959.25.6322.211.16.8
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.