Hamilton Mountain - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 10:00 PM EDT Friday 26 June 2026

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: 5:00 PM EDT Friday 26 June 2026

Friday night

4 - Moderate Risk

Saturday

3 - Low Risk

Saturday night

3 - 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...?

Canada is the 2nd highest per capita emitter of greenhouse gases in the world, and our emissions are growing by 1.5% every year.


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

AQHIScale

Observed ConditionsFootnote †


4 - Moderate Risk

Calculated at:

10:00 PM EDT Friday 26 June 2026

 

Forecast Maximums


Friday night
4 - Moderate Risk



Saturday
3 - Low Risk



Saturday night
3 - Low Risk



Sunday
2 - Low Risk




Issued at:

5:00 PM EDT Friday 26 June 2026

 

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

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