Newmarket - Air Quality Health Index
Calculated at: 3:00 AM EDT Sunday 6 July 2025
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 EDT Saturday 5 July 2025
Saturday night
4
- Moderate Risk
Sunday
3
- Low Risk
Sunday night
3
- Low Risk
Monday
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, your physician, or your local health authority.
Visit the national AQHI Web site to learn more about the AQHI.
Did you know...?
Air pollution makes asthma symptoms worse, such as coughing, wheezing, tightness in the chest and shortness of breath.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
