Welcome to Environmental Protection Department Air Quality Health Index Website


Central
Date TimeNO2O3SO2COPM10PM2.5
2021-10-22 05:0032.227.51.01,023.15.35.3
2021-10-22 04:0031.333.10.81,032.96.76.2
2021-10-22 03:0028.136.10.71,018.28.96.9
2021-10-22 02:0038.128.41.11,064.612.07.5
2021-10-22 01:0048.321.41.51,069.415.88.3
2021-10-22 00:0057.817.6-1,093.118.210.3
2021-10-21 23:0068.512.33.01,142.121.713.1
2021-10-21 22:0074.910.43.31,198.323.012.7
2021-10-21 21:0071.29.53.61,233.024.814.1
2021-10-21 20:0089.55.35.81,262.824.413.7
2021-10-21 19:0094.04.47.31,308.531.218.3
2021-10-21 18:0090.33.46.21,363.631.318.0
2021-10-21 17:0092.63.45.41,286.237.019.4
2021-10-21 16:0092.94.24.61,290.147.624.9
2021-10-21 15:00102.54.66.41,317.436.619.7
2021-10-21 14:0087.010.9-1,349.245.827.9
2021-10-21 13:0098.58.3-1,529.633.720.7
2021-10-21 12:0088.613.9-1,362.227.913.8
2021-10-21 11:0095.12.9-1,299.329.916.7
2021-10-21 10:00100.92.7-1,388.036.822.8
2021-10-21 09:00103.72.110.31,307.922.210.3
2021-10-21 08:0080.33.75.01,242.416.98.5
2021-10-21 07:0061.24.84.11,104.314.27.9
2021-10-21 06:0046.416.53.31,057.815.310.4
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: 05:07 22-10-2021