Thunder Bay - Air Quality Health Index

SPECIAL AIR QUALITY STATEMENT

Observed ConditionsFootnote †

Calculated at: 11:00 AM EDT Monday 14 July 2025

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 Monday 14 July 2025

Monday

7 - High Risk

Monday night

7 - High Risk

Tuesday

6 - Moderate Risk

Tuesday night

4 - Moderate 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...?

Even healthy people can have difficulty breathing on days when the index is high.


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

SPECIAL AIR QUALITY STATEMENT
AQHIScale

Observed ConditionsFootnote †


4 - Moderate Risk

Calculated at:

11:00 AM EDT Monday 14 July 2025

 

Forecast Maximums


Monday
7 - High Risk



Monday night
7 - High Risk



Tuesday
6 - Moderate Risk



Tuesday night
4 - Moderate Risk




Issued at:

6:00 AM EDT Monday 14 July 2025

 

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

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