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Air Quality Health Index

Learn about the Air Quality Health Index (AQHI) and how you can use it to determine your level of health risk.

Services and information

The Air Quality Health Index provides a number from 1 to 10 to indicate the level of relative health risk associated with local air quality.

Learn about the impact of air pollutants on human health and what you can do to protect yourself and reduce air pollution.

The national Air Quality Health Index (AQHI) is calculated based on data collected in major cities across Canada.

Applications, videos and other education and media resources related to the Air Quality Health Index (AQHI).


The Air Quality Health Index (AQHI) helps you understand what the air quality around you means to your health. The AQHI is a tool that relates the air quality outside to your health, using a scale from 1 to 10. The lower the number, the lower the risk.

Find out about the AQHI.