Hamilton - Air Quality Health Index
Calculated at: 2:00 PM EDT Friday 25 July 2025
2Low Risk
2
3
4
5
6
7
8
9
10
+
Moderate Risk
(4-6)
High Risk
(7-10)
Very High Risk
At-Risk Population:
- Enjoy your usual outdoor activities.
- Find out if you are at risk
General Population:
- Ideal air quality for outdoor activities.
Issued at: 6:00 AM EDT Friday 25 July 2025
Friday
3
- Low Risk
Friday night
3
- Low Risk
Saturday
3
- Low Risk
Saturday night
3
- 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, your physician, or your local health authority.
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.
