Welcome to Environmental Protection Department Air Quality Health Index Website


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Date TimeNO2O3SO2COPM10PM2.5
2021-10-22 04:008.043.26.8792.44.32.3
2021-10-22 03:008.144.06.9812.48.14.9
2021-10-22 02:0010.446.37.8819.48.14.7
2021-10-22 01:00----12.45.0
2021-10-22 00:009.754.66.8817.414.74.8
2021-10-21 23:0011.554.46.7824.113.84.2
2021-10-21 22:0012.055.96.8824.815.45.8
2021-10-21 21:0011.657.16.9830.116.35.2
2021-10-21 20:0011.757.27.1826.317.59.5
2021-10-21 19:0012.156.96.9827.418.111.1
2021-10-21 18:0012.757.76.9825.918.99.3
2021-10-21 17:0012.858.46.8811.318.710.0
2021-10-21 16:0012.957.86.8815.818.110.4
2021-10-21 15:0011.257.76.9809.821.65.9
2021-10-21 14:009.759.36.9790.525.53.8
2021-10-21 13:0011.362.96.7786.931.27.4
2021-10-21 12:0011.860.56.6794.335.616.4
2021-10-21 11:0010.883.46.9742.232.118.4
2021-10-21 10:0014.0103.26.8710.625.013.5
2021-10-21 09:0013.578.36.7712.18.86.0
2021-10-21 08:006.843.76.3706.610.43.6
2021-10-21 07:0010.832.36.6688.217.62.3
2021-10-21 06:005.360.86.4692.320.05.8
2021-10-21 05:005.345.66.7691.720.52.5
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: 04:07 22-10-2021