Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2022-12-01 18:0043.411.73.5-15.46.4
2022-12-01 17:0041.116.43.8---
2022-12-01 16:0038.622.03.7---
2022-12-01 15:0037.022.73.5---
2022-12-01 14:0035.423.53.6---
2022-12-01 13:0031.621.93.8---
2022-12-01 12:0026.021.13.1---
2022-12-01 11:0026.318.22.9---
2022-12-01 10:0028.013.53.2-9.65.5
2022-12-01 09:0030.510.53.4-9.24.9
2022-12-01 08:0027.29.94.0-8.65.8
2022-12-01 07:0021.413.93.4-8.66.0
2022-12-01 06:0017.717.13.2-7.84.9
2022-12-01 05:0018.316.63.7-8.76.1
2022-12-01 04:00-16.43.6-12.48.7
2022-12-01 03:0021.014.03.4-13.49.0
2022-12-01 02:00-12.6--17.011.2
2022-12-01 01:0028.49.23.0-18.211.2
2022-12-01 00:0029.5-3.9-16.910.7
2022-11-30 23:0029.710.13.3-14.08.7
2022-11-30 22:0030.412.33.8-14.48.4
2022-11-30 21:0033.610.04.3-16.99.8
2022-11-30 20:0035.48.74.7-16.78.2
2022-11-30 19:0038.68.94.3-15.68.7
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: 18:07 01-12-2022