Welcome to Environmental Protection Department Air Quality Health Index Website


Central/Western
Date TimeNO2O3SO2COPM10PM2.5
2024-03-01 02:0017.147.72.6-3.20.6
2024-03-01 01:00-30.4--4.81.3
2024-03-01 00:0035.824.72.8-5.61.3
2024-02-29 23:0044.514.43.1-7.63.2
2024-02-29 22:0046.010.32.7-10.56.1
2024-02-29 21:0050.35.83.5-18.813.7
2024-02-29 20:0044.74.83.5-19.112.3
2024-02-29 19:0040.77.94.1-20.510.2
2024-02-29 18:0042.45.73.9-26.914.4
2024-02-29 17:0048.05.64.0-61.535.0
2024-02-29 16:0066.46.14.1-117.067.0
2024-02-29 15:0081.37.85.5-122.871.7
2024-02-29 14:0095.711.85.3-60.739.1
2024-02-29 13:0055.251.91.6-37.225.6
2024-02-29 12:0060.946.51.9-38.124.7
2024-02-29 11:0060.737.41.6-41.625.2
2024-02-29 10:0065.629.51.6-39.325.1
2024-02-29 09:0056.241.41.4-33.422.1
2024-02-29 08:0036.249.61.2-32.519.7
2024-02-29 07:0016.869.21.2-30.815.8
2024-02-29 06:0011.177.91.1-31.216.9
2024-02-29 05:009.982.01.1-32.317.1
2024-02-29 04:0010.283.51.1-33.718.0
2024-02-29 03:0013.984.42.2-33.018.8
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: 02:07 01-03-2024