July 2023

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Understanding Particulate Hazards Indoors and Out

A key topic affecting thousands of Canadians, at work, at home and everywhere they go.

Wildfire smoke has spread widely across North America this spring and summer, raising awareness and elevating concern.

Join Dr. Dave Stieb, a Health Canada physician and epidemiologist in conversation with John Oudyk, OHCOW Occupational Hygienist to understand and use the AQHI (AirQuality Health Index), gain practical ideas for homes and workplaces to minimize exposure at peak times and more! With a live Q&A session.

More Info and Register

NEW! Wildfire Smoke Infographic

This 4-page infographic covers the signs and symptoms of wildfire smoke exposure as well as tips for prevention when working indoors and outdoors. Post it in your workplace or distribute it as a hand out!

Download PDF


Compensation Available

Funds are available for those who acquired Parkinson’s Disease as a result of their workplace exposure, if you or a family member worked in Ontario between 1940 and 1979.

See the article by Dave Wilken for more information.

New Research

In April 2023, the paper Lung Cancer and Exposures in Ontario Hard Rock Mines, prepared and reviewed by OHCOW hygienists and consultants was published.

Check out the Mcintyre Powder Newsletter for more updates!


OHCOW has a range of valuable resources and information for those effected by heat stress. Anyone is vulnerable to symptoms of extreme heat during the summer months.

 Here are a few of our recent and most popular links and downloads:

Humidex-based Heat Stress Calculator and Plan

NEW! 4-page Infographic: The Signs and Symptoms of Heat Stress

A Webinar Presentation on Hot Work Sites and Health

Heat Stress Awareness Guide


Understanding the Post-COVID-19

Condition in Canada

Dr. Sarah Viehbeck, Chief Science Officer, Public Health Agency of Canada and Member, Chief Science Advisor of Canada’s Task Force on Post-COVID-19 Condition joined OHCOW Hygienist Kevin Hedges last month to discuss Canada's post-covid condition, including the effects of long covid and how we can recognize, assess and control the hazards that contribute to COVID-19 infection.

View OCC-Covid Webinar

Masking in Healthcare

A Panel discussion on mask usage by healthcare workers. With:

Kevin Hedges, Occupational Hygienist, OHCOW

Dr. Joe Vipond, Emergency Physician, Rockyview General Hospital in Alberta

Dr. Allen Kraut, Physician, Occupational Health Centre in Manitoba

View Masking Webinar
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