Hamilton Downtown - Air Quality Health Index
Calculated at: 12:00 AM EDT Sunday 6 July 2025
3Low 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: 5:00 PM EDT Saturday 5 July 2025
Saturday night
4
- Moderate Risk
Sunday
4
- Moderate Risk
Sunday night
4
- Moderate Risk
Monday
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, or your physician.
Visit the national AQHI Web site to learn more about the AQHI.
Did you know...?
Ten seconds of idling can use more fuel than turning off the engine and restarting it.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
