Toronto Downtown - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 9:00 AM EDT Tuesday 28 April 2026

4Moderate Risk




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



At-Risk Population:

General Population:

  • No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.

Forecast Maximums

Issued at: 6:00 AM EDT Tuesday 28 April 2026

Tuesday

4 - Moderate Risk

Tuesday night

3 - Low Risk

Wednesday

4 - Moderate Risk

Wednesday night

3 - Low Risk

Who is at risk?

People with heart and lung conditions are most affected by air pollution.

To find out if you are at risk, consult the health guide, or your physician.

Visit the national AQHI Web site to learn more about the AQHI.

Did you know...?

If you're a diabetic, you may be at increased risk from air pollution.


The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

AQHIScale

Observed ConditionsFootnote †


4 - Moderate Risk

Calculated at:

9:00 AM EDT Tuesday 28 April 2026

 

Forecast Maximums


Tuesday
4 - Moderate Risk



Tuesday night
3 - Low Risk



Wednesday
4 - Moderate Risk



Wednesday night
3 - Low Risk




Issued at:

6:00 AM EDT Tuesday 28 April 2026

 

The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

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