Welcome to Environmental Protection Department Air Quality Health Index Website


Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2021-12-04 08:0059.442.514.5570.925.314.0
2021-12-04 07:0061.035.415.2608.123.813.4
2021-12-04 06:0037.754.816.4556.128.316.5
2021-12-04 05:0043.045.116.5588.725.913.9
2021-12-04 04:0028.563.917.3546.724.512.3
2021-12-04 03:0053.530.916.5662.529.416.7
2021-12-04 02:0065.918.819.2696.630.915.3
2021-12-04 01:00----33.215.9
2021-12-04 00:0081.121.816.3704.035.416.6
2021-12-03 23:0067.633.516.8633.638.517.3
2021-12-03 22:0093.612.714.1852.650.422.5
2021-12-03 21:00111.12.413.51,261.452.923.3
2021-12-03 20:00112.74.913.3949.944.117.8
2021-12-03 19:00108.412.512.9745.837.513.2
2021-12-03 18:0088.332.312.6655.137.011.4
2021-12-03 17:0062.659.612.9550.343.013.7
2021-12-03 16:0055.371.913.0543.050.618.8
2021-12-03 15:0044.188.413.0529.155.119.8
2021-12-03 14:0054.290.013.1550.145.214.4
2021-12-03 13:0039.081.413.2538.340.012.1
2021-12-03 12:0035.471.913.3522.540.012.1
2021-12-03 11:0040.662.313.6567.543.715.3
2021-12-03 10:0052.945.514.9594.243.618.5
2021-12-03 09:0063.929.515.5628.842.219.3
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.

Mobile Version | Desktop Version
Last revision date: 08:07 04-12-2021