Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2022-05-20 12:0054.689.15.3689.043.520.4
2022-05-20 11:0047.281.94.4673.630.316.7
2022-05-20 10:0034.977.33.3648.027.716.3
2022-05-20 09:0049.954.73.3683.223.313.9
2022-05-20 08:0037.262.22.8676.025.315.4
2022-05-20 07:0037.354.52.9668.023.614.3
2022-05-20 06:0023.561.62.8622.620.512.4
2022-05-20 05:0016.974.72.7590.319.812.4
2022-05-20 04:0024.967.03.1626.026.616.7
2022-05-20 03:0033.364.43.2662.027.416.4
2022-05-20 02:0033.673.43.4674.726.616.3
2022-05-20 01:0034.076.73.3663.727.216.3
2022-05-20 00:0037.078.43.3696.227.816.6
2022-05-19 23:0056.565.74.8733.734.419.7
2022-05-19 22:00102.227.15.9808.133.618.5
2022-05-19 21:0092.338.35.3764.333.318.2
2022-05-19 20:0089.354.67.1712.532.817.7
2022-05-19 19:0084.978.55.4736.435.215.4
2022-05-19 18:0075.098.65.3704.236.515.8
2022-05-19 17:0073.1105.25.3695.938.316.7
2022-05-19 16:0054.7127.45.4667.133.513.9
2022-05-19 15:0042.4133.35.1624.226.312.4
2022-05-19 14:0035.8128.13.5579.019.511.1
2022-05-19 13:0028.8118.33.4557.023.613.3
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.

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Last revision date: 12:07 20-05-2022