ASEQ-EHAQ

L'Association pour la santé environnementale du Québec / Environmental Health Association of Quebec

Statistics

Multiple Chemical Sensitivity

Multiple Chemical Sensitivity (MCS) affects a growing number of Canadians. Despite its significant impact, MCS remains widely misunderstood, underrecognized and neglected. This website brings together key statistics to help shed light on the reality faced by those living with MCS — from its prevalence and demographics to its effects on health, daily life, and socioeconomic well-being.

Through precise data and visual insights, you’ll discover:

  • Who is most affected by MCS across Canada and Québec
  • How common MCS is in the population
  • The health challenges and multiple chronic conditions that are often linked to MCS
  • The impact on quality of life, including employment, income, and access to care
  • The broader social and economic implications for individuals and communities

Behind every percentage and data point are real people whose lives are deeply affected by exposures in the environment. The statistics on this site are not just numbers — they represent lost opportunities, unmet healthcare needs, and the urgent call for greater understanding and action.

By presenting this information in a clear and accessible way, our goal is to:

  • Raise awareness of MCS as a legitimate and serious health condition;
  • Inform decision-makers and researchers to encourage better recognition and support;
  • Empower individuals and communities with knowledge that drives change.

Our goal is to raise awareness, promote understanding, and support advocacy for better recognition and protection of people with MCS. By exploring these statistics, we invite you to look beyond the numbers and consider the human impact they represent.