Toronto North - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 5:00 PM EDT Monday 18 May 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: 5:00 PM EDT Monday 18 May 2026

Monday night

4 - Moderate Risk

Tuesday

3 - Low Risk

Tuesday night

3 - Low Risk

Wednesday

2 - 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...?

Riding your bike, walking or rollerblading to work is good for your health and keeps the air clean.


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

AQHIScale

Observed ConditionsFootnote †


4 - Moderate Risk

Calculated at:

5:00 PM EDT Monday 18 May 2026

 

Forecast Maximums


Monday night
4 - Moderate Risk



Tuesday
3 - Low Risk



Tuesday night
3 - Low Risk



Wednesday
2 - Low Risk




Issued at:

5:00 PM EDT Monday 18 May 2026

 

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

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