Air Quality

Air Quality Health Index

The Environmental Protection Department releases Air Quality Health Index (AQHI) information hourly to inform 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.  Learn about how the AQHI works and what it can tell you about the short-term health risk of air pollution.

Current AQHIs

Find the current AQHIs here.  The current AQHI readings are available 24 hours a day, seven days a week.