AQHI Forecast:

Forecast: Ontario's Air Quality Health Index

• Air Quality forecasts not available at this time.
• No Environment Canada location AQHI forecasts6:00 am EST February 5, 2025.

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No Ontario Ministry of the Environment and Climate Change location forecasts available since December 31, 1969 (since _date)

Forecasts Data Not Available

Air Quality Health Index (AQHI) Categories

Air Quality Health Index Categories, Values and Associated Colours

Air Quality Health Index Categories and Values
1	2	3	4	5	6	7	8	9	10	+
Low Risk (1 - 3)			Moderate Risk (4 - 6)			High Risk (7 - 10)				Very High Risk

• Summary of Current AQHI Observations and Forecasts

Note:

• The Air Quality Health Index on this web page are based on automatically polled data and have not undergone final verification.
• N/A (Not Available) denotes invalid or missing data.

Air Quality Health Index Categories and Health Messages

The table below provides the health messages for each category of the Air Quality Health Index for the "at risk" population and the general population.

Health Risk	Air Quality Health Index	Health Messages
		At Risk Population*	General Population
Low	1 - 3	Enjoy your usual outdoor activities.	Ideal air quality for outdoor activities.
Moderate	4 - 6	Consider 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.
High	7 - 10	Reduce 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 High	Above 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.