Welcome to Environmental Protection Department Air Quality Health Index Website


Tsuen Wan
Date TimeNO2O3SO2COPM10PM2.5
2024-05-03 12:0027.7116.60.5399.426.814.4
2024-05-03 11:0028.0112.40.4411.423.910.7
2024-05-03 10:0032.5103.70.7441.421.910.0
2024-05-03 09:0033.5102.30.7470.423.414.5
2024-05-03 08:0030.4106.60.8518.522.014.4
2024-05-03 07:0020.3118.10.6518.217.311.3
2024-05-03 06:0010.5132.10.5552.320.214.1
2024-05-03 05:007.3137.90.4530.220.312.5
2024-05-03 04:006.1142.40.8535.019.212.0
2024-05-03 03:006.4142.20.8532.317.710.4
2024-05-03 02:007.7139.90.6506.619.112.4
2024-05-03 01:0012.6138.10.5513.713.910.3
2024-05-03 00:0017.0135.30.6530.410.48.6
2024-05-02 23:0022.7128.50.7580.511.47.8
2024-05-02 22:0022.9124.41.0579.314.610.4
2024-05-02 21:0026.6118.60.7605.922.213.1
2024-05-02 20:0034.6113.60.8631.226.815.6
2024-05-02 19:0036.5113.31.1617.927.115.2
2024-05-02 18:0038.6110.91.0603.326.816.8
2024-05-02 17:0038.6110.31.2595.922.214.7
2024-05-02 16:0041.8105.81.1661.319.312.5
2024-05-02 15:0034.4115.70.9642.213.17.7
2024-05-02 14:0033.5105.6-621.317.811.1
2024-05-02 13:0033.9105.0-596.722.014.1
Remarks:

(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m3).

(3) Abbreviation:
NO2 - nitrogen dioxide, O3 - ozone,
SO2 - sulphur dioxide, CO - carbon monoxide,
PM10 - respirable suspended particulates,
PM2.5 - fine suspended particulates

(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.

Last revision date: 12:07 03-05-2024