Welcome to Environmental Protection Department Air Quality Health Index Website


Central
Date TimeNO2O3SO2COPM10PM2.5
2023-03-23 05:0015.730.22.4385.9--
2023-03-23 04:0016.631.22.8404.1--
2023-03-23 03:00-19.1----
2023-03-23 02:0020.029.42.5432.3--
2023-03-23 01:0023.526.52.8447.0--
2023-03-23 00:0033.217.22.9515.3--
2023-03-22 23:0034.717.33.3577.9--
2023-03-22 22:0038.113.33.4655.7--
2023-03-22 21:0037.712.53.8728.7--
2023-03-22 20:0041.715.13.2684.5--
2023-03-22 19:0037.919.13.3633.0--
2023-03-22 18:0039.918.53.6544.5--
2023-03-22 17:0028.029.53.0473.4--
2023-03-22 16:0027.827.23.5474.2--
2023-03-22 15:0029.224.73.1538.8--
2023-03-22 14:0031.123.53.5612.3--
2023-03-22 13:0026.726.53.6483.8--
2023-03-22 12:0034.420.94.2513.3--
2023-03-22 11:0025.628.82.9455.8--
2023-03-22 10:0028.923.73.0466.712.0-
2023-03-22 09:0042.216.13.4555.25.2-
2023-03-22 08:0029.223.22.8482.45.9-
2023-03-22 07:0029.9-2.7434.15.5-
2023-03-22 06:0021.631.62.5406.72.3-
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 23-03-2023