Welcome to Environmental Protection Department Air Quality Health Index Website


Central
Date TimeNO2O3SO2COPM10PM2.5
2023-02-05 18:0048.132.81.3513.27.8-
2023-02-05 17:0062.124.91.7559.411.3-
2023-02-05 16:0061.924.41.8531.411.4-
2023-02-05 15:0051.032.21.5531.014.2-
2023-02-05 14:0046.340.11.2505.014.4-
2023-02-05 13:0037.842.51.3509.117.7-
2023-02-05 12:0032.839.11.2523.820.0-
2023-02-05 11:0040.629.71.4570.521.8-
2023-02-05 10:0039.026.91.3519.024.7-
2023-02-05 09:0039.027.71.6474.321.5-
2023-02-05 08:0039.729.51.5437.324.124.1
2023-02-05 07:0037.832.31.4415.920.3-
2023-02-05 06:0027.143.01.3431.522.9-
2023-02-05 05:0021.050.81.5410.522.1-
2023-02-05 04:0018.753.52.0408.522.9-
2023-02-05 03:00-53.9--27.8-
2023-02-05 02:0022.554.31.6451.827.6-
2023-02-05 01:0030.650.31.8461.236.033.2
2023-02-05 00:0039.246.31.6451.930.127.1
2023-02-04 23:0042.150.91.8450.026.625.0
2023-02-04 22:0052.945.71.9553.632.730.6
2023-02-04 21:0063.538.12.1575.332.130.5
2023-02-04 20:0068.134.92.3577.022.721.8
2023-02-04 19:0078.128.02.4544.824.0-
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 05-02-2023