Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2021-01-23 00:00104.52.18.7-79.757.9
2021-01-22 23:00112.61.69.7-72.153.0
2021-01-22 22:00109.33.99.0-59.844.9
2021-01-22 21:00108.85.18.5-53.540.8
2021-01-22 20:00113.14.08.3-42.232.3
2021-01-22 19:0094.022.47.2-38.127.8
2021-01-22 18:00105.223.78.4-46.327.9
2021-01-22 17:0097.252.27.6-49.534.1
2021-01-22 16:0071.8102.96.3-46.132.7
2021-01-22 15:0071.970.57.8-46.634.4
2021-01-22 14:0081.556.19.8-60.744.4
2021-01-22 13:0088.857.111.3-78.359.9
2021-01-22 12:0098.042.014.1-89.767.5
2021-01-22 11:00108.122.514.1-89.466.1
2021-01-22 10:00104.512.113.5-86.464.7
2021-01-22 09:00102.55.315.5-85.859.5
2021-01-22 08:00106.83.014.7-90.865.0
2021-01-22 07:00108.72.014.1-87.965.0
2021-01-22 06:00100.41.911.8-85.163.9
2021-01-22 05:0094.81.810.4-86.864.0
2021-01-22 04:00-1.8--94.469.1
2021-01-22 03:00105.31.911.3-111.274.9
2021-01-22 02:00118.82.011.5-147.896.4
2021-01-22 01:00157.12.213.6-178.8125.5
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: 00:07 23-01-2021