Air Quality Health Index (AQHI)

Air Quality Health Index Categories, Values and Associated Colours
Air Quality Health Index Categories and Values
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
 

AQHI Observations and Forecasts

  • Current AQHI calculated at 11:00 pm EST January 19, 2022
  • Air Quality forecasts not available at this time.
  • No Environment Canada location AQHI forecasts since January 18, 2022

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  • No Ontario location AQHI forecasts available since December 31, 1969 (since _date)
Current and Forecast Air Quality Health Index for Ontario
LocationCurrentForecast Maximums
Wednesday, 11:00 pm Forecasts Not Available
Barrie
 2
Low Risk
Belleville
 2
Low Risk
Brampton
 2
Low Risk
Brantford
 2
Low Risk
Burlington
 2
Low Risk
Chatham
 2
Low Risk
Cornwall
 2
Low Risk
Dorset
 2
Low Risk
Grand Bend

  N/A
Guelph
 2
Low Risk
Hamilton Downtown
 2
Low Risk
Hamilton Mountain
 2
Low Risk
Hamilton West
 2
Low Risk
Kingston
 2
Low Risk
Kitchener
 2
Low Risk
London
 2
Low Risk
Milton
 2
Low Risk
Mississauga
 2
Low Risk
Newmarket
 2
Low Risk
North Bay
 2
Low Risk
Oakville
 2
Low Risk
Oshawa
 2
Low Risk
Ottawa Downtown
 3
Low Risk
Parry Sound
 2
Low Risk
Petawawa
 2
Low Risk
Peterborough
 2
Low Risk
Port Stanley
 2
Low Risk
Sarnia
 2
Low Risk
Sault Ste. Marie
 2
Low Risk
St. Catharines
 2
Low Risk
Sudbury
 2
Low Risk
Thunder Bay
 2
Low Risk
Tiverton
 2
Low Risk
Toronto Downtown
 3
Low Risk
Toronto East
 2
Low Risk
Toronto North
 2
Low Risk
Toronto West
 2
Low Risk
Windsor Downtown
 2
Low Risk
Windsor West
 2
Low Risk

Air Quality Health Index Categories and Health Messages

The table below provides the health messages for each category of the Air Quality Health Index for the "at risk" population and the general population.
Health Risk Air Quality Health Index Health Messages
At Risk Population* General Population
Low 1 - 3 Enjoy your usual outdoor activities. Ideal air quality for outdoor activities.
Moderate 4 - 6 Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms. No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.
High 7 - 10 Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy. Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation.
Very High Above 10 Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion. Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

* People with heart or breathing problems are at greater risk. Follow your doctor's usual advice about exercising and managing your condition.

Environment and Climate Change Canada website for AQHI readings and forecasts: https://www.canada.ca/en/environment-climate-change/services/air-quality-health-index.html

You can also get AQHI readings from recorded telephone messages by dialing 1-800-387-7768 (toll-free) or 416-246-0411 in Toronto.