Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2023-02-07 05:0011.761.83.4-8.58.4
2023-02-07 04:0013.261.33.4-9.98.6
2023-02-07 03:0015.960.53.8-15.011.9
2023-02-07 02:00-59.6--18.413.5
2023-02-07 01:0017.564.53.6-16.311.1
2023-02-07 00:0026.960.73.6-19.111.0
2023-02-06 23:0031.754.53.7-17.911.3
2023-02-06 22:0035.552.53.7-27.714.6
2023-02-06 21:0054.137.24.0-27.713.9
2023-02-06 20:0053.637.73.8-26.113.7
2023-02-06 19:0059.833.64.2-22.712.1
2023-02-06 18:0066.226.74.2-22.511.0
2023-02-06 17:0052.241.34.3-19.39.5
2023-02-06 16:0041.351.04.1-18.710.6
2023-02-06 15:0039.051.74.0-20.312.0
2023-02-06 14:0039.543.93.6---
2023-02-06 13:0038.339.93.7---
2023-02-06 12:0043.425.84.3---
2023-02-06 11:0046.317.64.3---
2023-02-06 10:0047.713.84.1-6.0-
2023-02-06 09:0046.917.93.8-6.8-
2023-02-06 08:0034.328.03.7-5.9-
2023-02-06 07:0016.248.73.4-2.0-
2023-02-06 06:009.353.23.5-1.4-
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 07-02-2023