Newmarket - Air Quality Health Index

Observed ConditionsFootnote †

Calculated at: 4:00 PM EST Monday 12 January 2026

2Low Risk




1
2
3
4
5
6
7
8
9
10
+

Low Risk
(1-3)

Moderate Risk
(4-6)

High Risk
(7-10)

Very High Risk



At-Risk Population:

General Population:

  • Ideal air quality for outdoor activities.

Forecast Maximums

Issued at: 6:00 AM EST Monday 12 January 2026

Monday

2 - Low Risk

Monday night

2 - Low Risk

Tuesday

3 - Low Risk

Tuesday night

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 are at greater risk of inhaling air pollution when they play in city parks and schoolyards near high traffic areas.


The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

AQHIScale

Observed ConditionsFootnote †


2 - Low Risk

Calculated at:

4:00 PM EST Monday 12 January 2026

 

Forecast Maximums


Monday
2 - Low Risk



Monday night
2 - Low Risk



Tuesday
3 - Low Risk



Tuesday night
2 - Low Risk




Issued at:

6:00 AM EST Monday 12 January 2026

 

The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

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