Canada’s air quality

Canada’s air quality has improved significantly over the last several decades as our air pollutant emissions continue to decline. Our air is consistently ranked among the cleanest in the world, according to the World Health Organization. This is largely due to federal, provincial and territorial governments working together to reduce air pollution from vehicles, power plants, and industries across the country.

The latest air pollutant emissions report shows an overall steady decline in air pollutant emissions since 1990. Despite this progress, almost one quarter of Canadians live in areas where at least one of PM2.5, ozone, SO2 and NO2 concentrations exceed ambient standards according to the CAAQS.

Learn about Canada’s air quality, sources of air pollution, and air quality health indicators:

Air quality

Canadian Environmental Sustainability Indicators

State of the Air report

Indoor air quality

While Canadians continue to self-isolate at home, indoor air quality is more important than ever. Indoor air quality can also affect your health in many ways.

You can improve indoor air quality by making your home smoke-free; installing and maintaining carbon monoxide alarms; controlling humidity, and using the exhaust fan when cooking, both of which can help to remove pollutants from your home and prevent mold growth. Learn more about some indoor air pollutants and other ways to improve the air quality inside your home:

What we’re doing to help improve indoor air quality

Monitoring air quality in new homes

Health Canada is looking for owners of new-build homes to participate in an indoor air-quality study. This project will investigate the indoor air quality in newly constructed homes and study pollutant emissions from building products. Email us to find out how you can participate!

Building product emissions and indoor air quality report

Health Canada published the results of a pilot project studying building materials emissions and indoor air quality in two newly constructed homes. Supplementary material on the study is also available.

Residential Indoor Air Quality Guidelines

The Residential Indoor Air-Quality Guidelines summarize the health risks of specific indoor pollutants. They also provide information on:

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