Thunder Bay - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 7:00 AM EDT Monday 27 April 2026

2Low 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:

  • Ideal air quality for outdoor activities.

Forecast Maximums

Issued at: 6:00 AM EDT Monday 27 April 2026

Monday

2 - Low Risk

Monday night

2 - Low Risk

Tuesday

2 - Low Risk

Tuesday night

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...?

People with respiratory or cardiovascular disease are more sensitive to air pollution because their illnesses increase its impact on their health.


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

AQHIScale

Observed ConditionsFootnote †


2 - Low Risk

Calculated at:

7:00 AM EDT Monday 27 April 2026

 

Forecast Maximums


Monday
2 - Low Risk



Monday night
2 - Low Risk



Tuesday
2 - Low Risk



Tuesday night
2 - Low Risk




Issued at:

6:00 AM EDT Monday 27 April 2026

 

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

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