Toronto Downtown - Air Quality Health Index
Calculated at: 4:00 PM EDT Friday 20 March 2026
6Moderate 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 EDT Friday 20 March 2026
Friday night
6
- Moderate Risk
Saturday
4
- Moderate Risk
Saturday night
4
- Moderate Risk
Sunday
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...?
People who live near a busy street or spend a lot of time outdoors face higher health risks related to outdoor air pollution.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
