Welcome to Environmental Protection Department Air Quality Health Index Website


Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2022-10-06 23:0020.785.73.0602.823.215.5
2022-10-06 22:0022.586.12.9626.723.016.0
2022-10-06 21:0025.284.53.4663.821.514.8
2022-10-06 20:0038.473.23.7731.526.018.3
2022-10-06 19:0050.461.03.9720.728.517.4
2022-10-06 18:0053.666.83.5660.626.616.6
2022-10-06 17:0036.476.33.2615.724.318.8
2022-10-06 16:0027.385.73.1610.927.321.8
2022-10-06 15:0033.077.93.4628.726.520.6
2022-10-06 14:0031.483.23.2594.620.714.4
2022-10-06 13:0024.188.83.1587.6--
2022-10-06 12:0016.691.23.2606.9--
2022-10-06 11:0017.581.83.1603.712.96.4
2022-10-06 10:0021.567.93.1659.615.48.4
2022-10-06 09:0021.761.43.2683.816.59.2
2022-10-06 08:0029.950.53.0657.619.012.2
2022-10-06 07:0023.658.22.9632.718.611.1
2022-10-06 06:0015.866.52.9618.217.58.2
2022-10-06 05:0010.276.42.8620.317.16.9
2022-10-06 04:007.083.62.9589.316.87.7
2022-10-06 03:005.887.93.0547.317.27.4
2022-10-06 02:009.286.54.6582.614.85.9
2022-10-06 01:00----12.44.0
2022-10-06 00:0014.886.52.6570.711.03.3
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: 23:07 06-10-2022