The air around you is not neutral.
More than 3.1 million Canadian adults report living with Multiple Chemical Sensitivity. For them, everyday spaces can be harmful.
We all have a role in making these spaces healthy, today and for future generations.
Find your roleThat is 9.4% of adults, or about 1 in 10. Diagnosed MCS rose from 611,000 in 2000 to over 1.1 million in 2020.
Only 900,100 adults (2.7%) report a diagnosis, leaving a gap that blocks access to care and accommodation.
12.8% of women compared with 5.9% of men. Nearly 70% of people reporting MCS are women.
Compared with 24% of the general population. People with MCS are also about 3 times more likely to report poor health.
Funded in part by the Government of Canada's Social Development Partnerships Program, Disability Component, through our ECRoB project.
Find the information that's right for you
People with MCS & Families
Learn how to live and manage day-to-day challenges
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Healthcare Providers
Clinical guidance, tools, and education
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Professionals & Employers
Workplace resources and accommodations
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Researchers
Studies, data, and collaboration opportunities
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Partners & Funders
Programs, impact, and ways to support
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Everyone deserves the right to breathe
A Canadian charitable non-profit working on advocacy, education, research, and support for people living with MCS.
More about us
Understanding MCS
What it is, what triggers it, and how many Canadians it affects.
View all in Learn
Practical steps for everyday life
Reduce exposures at home, at work, and in public spaces.
View all in Live & Manage
Our work in action
Funded projects, housing, and research that remove barriers for people with MCS.
View all projects
ECRoB: Empowering Community and Removal of Barriers
A five-year project (2022 to 2027) funded by the Government of Canada to remove barriers for people with MCS.
Funded by the Government of Canada
ECOASIS housing
Building healthy, accessible housing for people with MCS.
Fundraising now
Participate in research
Five active studies looking for people with lived experience.
Open studiesJoin the movement for cleaner air
Give, join, or speak up for safer air and full recognition of MCS.
All ways to get involvedUpcoming events
Webinars, conferences, and community gatherings.
View all events
Resilience 2026: International MCS Conference
Two days with researchers, clinicians, and people with lived experience, in partnership with Women's College Hospital.
Fragrance-free workplaces webinar
How employers can put source control into practice. Placeholder: swap for a real event.
Annual general meeting
Members review the year and vote on the board. Placeholder: swap for a real event.