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Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2022-01-23 02:0018.858.84.4614.76.4-
2022-01-23 01:00----5.9-
2022-01-23 00:0028.151.02.7642.37.2-
2022-01-22 23:0026.152.82.7641.86.05.9
2022-01-22 22:0022.558.62.7612.96.85.4
2022-01-22 21:0027.355.52.7662.58.86.9
2022-01-22 20:0038.545.02.7706.29.48.2
2022-01-22 19:0059.831.33.0821.610.89.4
2022-01-22 18:0054.531.02.8782.815.812.3
2022-01-22 17:0055.928.92.9784.913.810.5
2022-01-22 16:0052.425.72.9810.910.88.7
2022-01-22 15:0042.834.42.7747.58.76.9
2022-01-22 14:0038.139.72.7788.88.67.4
2022-01-22 13:0037.537.02.7759.712.911.5
2022-01-22 12:0048.618.83.2867.713.713.4
2022-01-22 11:0051.012.53.0801.516.8-
2022-01-22 10:0054.212.82.9824.016.916.0
2022-01-22 09:0044.822.02.8786.520.419.0
2022-01-22 08:0045.122.72.7752.517.315.9
2022-01-22 07:0037.232.52.8765.815.114.4
2022-01-22 06:0020.849.82.7691.814.412.7
2022-01-22 05:0017.456.42.7681.216.814.0
2022-01-22 04:0012.664.22.7656.917.914.2
2022-01-22 03:0016.463.12.7666.017.415.1
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.

Last revision date: 02:07 23-01-2022