Toronto North - Air Quality Health Index
Calculated at: 1:00 AM EDT Thursday 19 March 2026
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: 6:00 AM EDT Wednesday 18 March 2026
Wednesday
4
- Moderate Risk
Wednesday night
3
- Low Risk
Thursday
3
- Low Risk
Thursday night
4
- Moderate 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...?
Children breathe in more pollution than adults.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
