Hamilton Downtown: current Air Quality Health Index (AQHI)

Calculated at 1:00 pm EDT Friday, July 17, 2026

7

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 Hamilton Downtown

• Forecast Air Quality Health Index maximums for Hamilton Downtown
• Issued at: 6:00 am EDT July 17, 2026

Forecast Air Quality Health Index maximums for Hamilton Downtown

Period	Forecast maximum (Issued at 6:00 am EDT July 17, 2026)
Friday	10+ - Very High Risk
Friday night	10+ - Very High Risk
Saturday	10 - High Risk

Health message for Hamilton Downtown

• Current Air Quality Health Index: 7
• Calculated at 1:00 pm EDT Friday, July 17, 2026
• Risk: High

At-risk population:

• Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy.
• Find out if you are at risk

General population:

• Reduce or reschedule strenuous activities outdoors, especially if 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.