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Past 24 Hours Pollutant Concentration Summary

Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2021-06-21 04:009.154.67.9565.222.312.4
2021-06-21 03:0010.150.58.0580.224.213.4
2021-06-21 02:00----25.014.0
2021-06-21 01:00----24.913.3
2021-06-21 00:0012.258.67.9584.924.513.1
2021-06-20 23:0014.156.08.0586.021.49.9
2021-06-20 22:0013.954.37.9536.120.710.0
2021-06-20 21:0015.752.27.9580.619.89.9
2021-06-20 20:0022.646.28.0668.619.110.1
2021-06-20 19:0021.350.28.1552.915.48.3
2021-06-20 18:0013.864.98.0432.315.98.4
2021-06-20 17:0012.576.98.0582.820.111.2
2021-06-20 16:0012.085.08.0637.623.813.7
2021-06-20 15:0020.280.07.9680.525.214.7
2021-06-20 14:0018.578.27.9629.324.914.2
2021-06-20 13:0013.384.88.0568.022.210.5
2021-06-20 12:0013.674.58.0568.724.211.9
2021-06-20 11:0013.469.88.0572.421.612.2
2021-06-20 10:0013.766.87.9542.819.710.4
2021-06-20 09:0012.161.38.6465.021.111.7
2021-06-20 08:0011.259.48.0494.021.611.6
2021-06-20 07:0017.353.77.8522.721.712.1
2021-06-20 06:009.560.57.9555.420.911.5
2021-06-20 05:007.462.47.9545.921.010.8
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.