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OEH Seminar: Building an evidence base for better subway air quality: The Subway Air Quality Initiative

Over the past 20 years, the body of research on subway air quality has grown dramatically. This work revealed high particulate matter (PM) levels sourced from brake and steel dust. Concentrated in the confined spaces of below-grade transit, PM2.5 levels can constitute a significant proportion of daily exposure for the substantial proportion of Canadians who use this method of transit. The Subway Air Quality Initiative (SAQI) aims to investigate the sources, trends, and mitigative strategies of subway PM to inform evidence-based air quality policy. Similar work is ongoing internationally as poor subway air quality is an emerging issue for several major cities around the world. 

Présentateur(s): Keith Van Ryswyk

Keith Van Ryswyk joined Health Canada in 2006 in the Air Health Science Division. In 2010, he began research assessing air pollution exposures in Canadian urban transit environments. This work lead to a focus on Canadian subway environments. In 2017, he joined the Southern Ontario Center for Atmospheric Aerosol Research (SOCAAR) as a PhD student with Dr. Greg Evans and began the Subway Air Quality Initiative (SAQI). This study aims to build a foundation of evidence upon which subway air quality policy can be designed.

Avis de non-responsabilité

The opinions expressed by speakers and moderators do not necessarily reflect the official policies or views of Public Health Ontario, nor does the mention of trade names, commercial practices, or organizations imply endorsement by Public Health Ontario.


The Occupational and Environmental Health Seminar Series is a self-approved group learning activity (Section 1) as defined by the Maintenance of Certification program of The Royal College of Physicians and Surgeons of Canada. The series is also approved by Council of Professional Experience for professional development hours (PDHs) for members of the Canadian Institute of Public Health Inspectors (CIPHI), and by the Canadian Registration Board of Occupational Hygienists (CRBOH) for Registration Maintenance (RM) points. For more information, please contact Elaina MacIntyre (elaina.macintyre@oahpp.ca). 


Public Health Ontario is committed to complying with the Accessibility for Ontarians with Disabilities Act (AODA). If you require accommodations to participate in this event, please contact 647-260-7100 or events@oahpp.ca.

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Publié le 25 févr. 2020