Mississauga - Air Quality Health Index

ORANGE WARNING - AIR QUALITY

Observed ConditionsFootnote †

Calculated at: 6:00 AM EDT Saturday 18 July 2026

9High 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:

  • Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation.

Forecast Maximums

Issued at: 6:06 AM EDT Saturday 18 July 2026

Saturday

10+ - Very High Risk

Saturday night

6 - Moderate Risk

Sunday

2 - Low Risk

Sunday 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...?

4, 000 people died in a few days during the great London "Smog Disaster" of 1952. Studies revealed the elderly and the very young were most affected.


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

ORANGE WARNING - AIR QUALITY
AQHIScale

Observed ConditionsFootnote †


9 - High Risk

Calculated at:

6:00 AM EDT Saturday 18 July 2026

 

Forecast Maximums


Saturday
10+ Very High Risk



Saturday night
6 - Moderate Risk



Sunday
2 - Low Risk



Sunday night
2 - Low Risk




Issued at:

6:06 AM EDT Saturday 18 July 2026

 

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

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