Standards, Regulation, Legislation and Agreements Air Quality Health Index (Hong Kong) Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download aqhi.htm en Added on: 28 August, 2026 Breadcrumb Home Resource Library Air Quality Health Index (Hong Kong) The Air Quality Health Index (AQHI) compiled by the Environmental Protection Department (EPD) of Hong Kong informs the public of the short-term health risk of air pollution in Hong Kong and helps the public take precautionary measures to protect their health. Here you can learn how the AQHI works and what it can tell you about the short-term health risk of air pollution.