Toronto Downtown: current Air Quality Health Index (AQHI)

Calculated at 12:00 am EST Wednesday, March 4, 2026

Forecast for Toronto Downtown

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Forecasts not available

Health message for Toronto Downtown

• Current Air Quality Health Index: 7
• Calculated at 12:00 am EST Wednesday, March 4, 2026
• Risk: High

At-risk population:

• Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy.
• Find out if you are at risk

General population:

• Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

See the Ontario Ministry of the Environment, Conservation and Parks air quality health messages.

Note: AQHI readings on this web page are based on automatically polled data and have not undergone final verification.