Hamilton - Air Quality Health Index
Calculated at: 8:00 PM EST Monday 2 February 2026
4Moderate Risk
2
3
4
5
6
7
8
9
10
+
Moderate Risk
(4-6)
High Risk
(7-10)
Very High Risk
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.
Issued at: 5:00 PM EST Monday 2 February 2026
Monday night
4
- Moderate Risk
Tuesday
3
- Low Risk
Tuesday night
3
- Low Risk
Wednesday
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, your physician, or your local health authority.
Visit the national AQHI Web site to learn more about the AQHI.
Did you know...?
Children, the elderly and those with heart or lung disease are most sensitive to the adverse health effects of air pollution.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
