Air Quality Health Index Categories and Health Messages

The AQHI uses a scale to show the health risk associated with the air pollution we breathe.

The following table provides the health messages for ‘at risk’ individuals and the general public for each of the AQHI Health Risk Categories.
Health Risk Air Quality Health Index Health Messages
At Risk Population*General Population
Low1 - 3Enjoy your usual outdoor activities.Ideal air quality for outdoor activities.
Moderate4 - 6Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.
High7 - 10Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy.Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation.
Very HighAbove
10
Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion.Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

* People with heart or breathing problems are at greater risk. Follow your doctor's usual advice about exercising and managing your condition.