Welcome to Environmental Protection Department Air Quality Health Index Website


Central
Date TimeNO2O3SO2COPM10PM2.5
2021-12-04 08:00102.210.97.3705.235.018.5
2021-12-04 07:0079.323.35.7661.625.613.3
2021-12-04 06:0054.448.05.2619.920.412.2
2021-12-04 05:0063.939.05.8639.821.613.5
2021-12-04 04:0065.537.36.1634.521.413.2
2021-12-04 03:00-39.8--34.321.1
2021-12-04 02:0076.526.67.4762.134.618.9
2021-12-04 01:0082.122.28.3775.839.117.9
2021-12-04 00:0099.79.89.2837.742.417.8
2021-12-03 23:00107.59.28.3812.146.718.8
2021-12-03 22:00104.110.77.4806.543.918.2
2021-12-03 21:00110.112.98.9796.238.718.1
2021-12-03 20:00128.15.911.6866.641.318.0
2021-12-03 19:00139.04.115.9896.441.017.7
2021-12-03 18:00135.96.914.3828.539.515.4
2021-12-03 17:00123.515.09.8748.839.316.3
2021-12-03 16:00126.512.810.0736.240.016.5
2021-12-03 15:00128.018.28.1726.636.615.5
2021-12-03 14:00108.522.57.1699.435.716.7
2021-12-03 13:00110.617.68.1724.734.215.3
2021-12-03 12:00113.015.98.1730.736.217.4
2021-12-03 11:0099.317.17.3746.834.316.2
2021-12-03 10:00104.113.010.1729.638.820.8
2021-12-03 09:00119.35.311.3854.134.916.3
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: 08:07 04-12-2021