Thunder Bay - Air Quality Health Index

Observed ConditionsFootnote †

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

Tuesday

3 - Low Risk

Tuesday night

2 - Low Risk

Wednesday

2 - Low Risk

Wednesday 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...?

Children, the elderly and those with heart or lung disease are most sensitive to the adverse health effects of air pollution.


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

AQHIScale

Observed ConditionsFootnote †


2 - Low Risk

Calculated at:

9:00 AM EDT Tuesday 28 April 2026

 

Forecast Maximums


Tuesday
3 - Low Risk



Tuesday night
2 - Low Risk



Wednesday
2 - Low Risk



Wednesday night
2 - 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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