Welcome to Environmental Protection Department Air Quality Health Index Website

(At 2024-04-20 16:00)


(1) Time shown is in Hong Kong time.

(2) The total percentage may not be equal to 100% due to rounding.

(3) Abbreviation:
SO2 - sulphur dioxide, NO2 - nitrogen dioxide, O3 - ozone,
PM – respirable suspended particulates (PM10) or fine suspended particulates (PM2.5), whichever poses a higher health risk.

(4) AR refers to Added Health Risk, please visit <What's AQHI> to learn more about AR and AQHI.

(5) The AQHI information is based on real time data taken directly from EPD's Air Quality Monitoring Network.

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Last revision date: 16:07 20-04-2024