Thunder Bay - Air Quality Health Index

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Observed ConditionsFootnote †

Calculated at: 4:00 AM EDT Saturday 31 October 2026

1Low 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: 5:00 PM EDT Friday 30 October 2026

Friday night

2 - Low Risk

Saturday

2 - Low Risk

Saturday night

2 - Low Risk

Sunday

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...?

Seniors are at higher risk because of their advanced age, weaker immune systems and increased likelihood of health problems such as heart and lung disease.


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

AQHIScale

Observed ConditionsFootnote †


1 - Low Risk

Calculated at:

4:00 AM EDT Saturday 31 October 2026

 

Forecast Maximums


Friday night
2 - Low Risk



Saturday
2 - Low Risk



Saturday night
2 - Low Risk



Sunday
2 - Low Risk




Issued at:

5:00 PM EDT Friday 30 October 2026

 

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

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