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  1. The Air Quality Index is based on measurement of particulate matter (PM 2.5 and PM 10), Ozone (O 3), Nitrogen Dioxide (NO 2), Sulfur Dioxide (SO 2) and Carbon Monoxide (CO) emissions. Most of the stations on the map are monitoring both PM 2.5 and PM 10 data, but there are few exceptions where only PM 10 is available.

  2. Concentration shown is in microgram per cubic metre (µg/m). The AQHI information is based on real time data taken directly from EPD's Air Quality Monitoring Network.

  3. 現時各區空氣質素摘要

  4. 現時空氣質素健康指數. 空氣質素健康指數預報. 對市民的忠告. 過去24小時空氣質素健康指數. 過去24小時污染物濃度. 過去空氣質素健康指數記錄. 每月空氣質素健康指數摘要. 其他相關連結. 有關空氣質素健康指數.

  5. 2021年9月15日 · The Air Quality Health Index (AQHI) reached theseriouslevelthe highest on the government scale – at three of the Environmental Protection Department’s 18 monitoring...

    • Zoe Low
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  7. 2024年9月30日 · Air pollution has reached “serious” and “very high risk” levels across Hong Kong, authorities have said, with a recent spate of weak winds preventing the dispersal of dangerous airborne ...

  8. Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.