Air Pollution in Toronto

Pollution by NASA Goddard Space Flight Center
Pollution by
NASA Goddard Center

Even though Canada boasts some of the strictest and most elaborate environmental protection laws in the world, it is not immune to the environmental threats that trouble all the industrialized countries. Big cities themselves pose a risk to natural balance, as it is almost impossible to control the amount waste produced by factories and households and to keep all the pollutants away from people. Today's article will be predominantly focused on the state of air pollution in the city of Toronto.

According to the Air Quality Health Index (AQHI), a project measuring the health risk arising from air pollution in the area, air pollutants in Toronto largely contribute to about 1,700 premature deaths and 6,000 hospital admissions each year. Additionally, about 12,000 cases of childhood bronchitis and 72,000 days of asthma symptoms are believed to be caused by exposure to the air in Toronto.

Dr. Barbara Yaffe, Toronto's Acting Medical Officer of Health, commented on the acquired data:

"Bad air reduces the quality of life for the city's children and adults, especially those who face a lifetime of chronic health problems made worse by air pollution."

A five-year-old study found that industries and various facilities in the city released about 2.8 million kilogram of toxic pollutants (the most common of which are PM2.5 and PM10, NOx, SO2, CO, and ground-level ozone) together with 13.2 million kilograms of criteria air contaminants. Such data don't mean much to most of us, but at that time, there was a survey comparing 27 cities over a ten-year period. Toronto ranked fourth on the nitrogen dioxide level list. Our levels were only exceeded by air pollution in Los Angeles, Hong Kong, and New York. The study also identified the main problem: the decreasing use of public transport services and more cars on the streets.

The most polluted areas include Alderwood, Humbermede, Humber Summit, West Hill, Cliffcrest, and Clairlea-Birchmont, together with Agincourt-Malvern and Islington. It's interesting to note that when drawn on the map of Toronto, the polluted neighbourhoods create a "U" pattern and stretch through the north west, along the western parts of the city, across the city centre and up to the north east. The unfortunate truth is that up to a point, the areas inhabited by low-income residents coincide with the areas of increased air pollution. These will be in special focus from the authorities as soon as possible, as the combined risks of poverty and unhealthy environment are a major threat to the future development of the neighbourhoods and their residents.

4 comments on “Air Pollution in Toronto

  1. Hi Angelica,

    thank you for your comment. Unfortunately, the air pollution problem is not solved yet, however it seems that the “air quality in the city and in Ontario has been steadily improving over the past decade”. You can use this article as a source: link to


  2. Hi, I’m doing an essay for geography and I need to know whether or not we have solved air pollution. Did we find a solution to air pollution?

  3. Hi all,
    How do we, residents of Alderwood, South Etobicoke, get the owners of the Silk Road Restaurant, to fix the chimney of their restaurant, and let us start enjoying our backyards, once again.
    Reviewers of this restaurant say that the food is good? It may be so; I haven’t eaten at the restaurant myself. I have to take their word for it. But the food is not the point of this letter.
    The pollution is!!
    We, the people who live north of the restaurant, and who are in the immediate vicinity of it, cannot, unfortunately, enjoy our backyards, cannot put the laundry out on the washing line, because of a very rancid, sharp smell that comes out of the chimney of this restaurant. I went to speak with the owner, and was met with hostility by both, his patrons and the owners themselves.
    We have complained to the city, but it seems that they don’t care? So, I appeal to all of you who may know the legal way in which to make the owners of this restaurant respect us, the people who live in this neighbourhood. We all, the residents of this neighbourhood, are asking the owners to be more considerate of the neighbours, as we, too, would like to enjoy our food, while sitting in our backyards.

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