Thunder Bay: current Air Quality Health Index (AQHI)

Calculated at 9:00 pm EST Tuesday, February 3, 2026

4

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

Forecast for Thunder Bay

• Forecast Air Quality Health Index maximums for Thunder Bay
• Issued at: 5:00 pm EST February 3, 2026

Forecast Air Quality Health Index maximums for Thunder Bay

Period	Forecast maximum (Issued at 5:00 pm EST February 3, 2026)
Tuesday	2 - Low Risk
Tuesday night	2 - Low Risk
Wednesday	2 - Low Risk

Health message for Thunder Bay

• Current Air Quality Health Index: 4
• Calculated at 9:00 pm EST Tuesday, February 3, 2026
• Risk: Moderate

At-risk population:

• Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.
• Find out if you are at risk

General population:

• No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.

See the Ontario Ministry of the Environment, Conservation and Parks air quality health messages.

Note: AQHI readings on this web page are based on automatically polled data and have not undergone final verification.