Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2022-01-20 19:00122.430.45.4942.249.430.0
2022-01-20 18:0093.359.55.4886.640.425.5
2022-01-20 17:0078.765.55.5829.048.030.8
2022-01-20 16:0081.875.45.8852.143.829.1
2022-01-20 15:0057.886.95.1765.722.716.1
2022-01-20 14:0029.797.74.6667.317.112.3
2022-01-20 13:0024.195.75.0674.125.717.3
2022-01-20 12:0039.061.25.2799.434.922.5
2022-01-20 11:0042.536.75.2872.332.119.7
2022-01-20 10:0042.625.55.1881.627.017.2
2022-01-20 09:0048.015.64.9900.130.722.5
2022-01-20 08:0060.13.95.51,002.824.818.7
2022-01-20 07:0055.21.95.11,019.519.914.3
2022-01-20 06:0047.110.13.5909.320.215.5
2022-01-20 05:0042.813.03.1867.823.518.6
2022-01-20 04:0043.28.73.5885.720.915.6
2022-01-20 03:0050.08.95.5900.920.615.3
2022-01-20 02:0042.124.03.0870.920.114.4
2022-01-20 01:0044.432.43.1826.418.111.8
2022-01-20 00:0046.336.33.2838.327.116.8
2022-01-19 23:0076.816.04.11,050.743.129.0
2022-01-19 22:0087.616.03.81,102.534.620.5
2022-01-19 21:0066.545.13.0946.835.521.2
2022-01-19 20:0068.360.13.0960.334.120.3
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: 19:07 20-01-2022