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Environmental and Workplace Health

Air Quality

The quality of the air we breathe is critical to our health as Canadians.

Scientists here and around the world are taking a closer look at what is in our air and how elevated levels of air pollution can threaten our health. The Government of Canada uses this research evidence to create policies, tools and practices that better protect all of us--but especially those most at risk, such as children and seniors--from the harmful effects of air pollution.

What Information is Available

The quality of the air we breathe both indoors and outdoors is of equal concern, yet each involves varying sources of air pollutants and therefore requires different scientific approaches and solutions.

  • Indoor Air Quality: As Canadians, we spend much of our lives inside buildings, whether at home, in school or at work, so the quality of indoor air is important to all of us. Contaminants such as mould, radon, carbon monoxide and formaldehyde can easily contaminate these everyday environments unless we take steps to control them.
  • Outdoor Air Quality: Air pollution from common sources, such as traffic and industry, compromises the quality of the air we breathe when we're outside. While researchers continue to study exactly how air pollution affects our health, tools are being developed to help us decide for ourselves how best to protect our own health--as individuals with unique needs and circumstances--whenever we venture out of doors.