Recruitment for radon testing is now complete!


Thank you to all our participants! We have now finished recruiting workplaces for our radon study.

For participating workplaces, please reach out to Lily Yang ( if you have any questions.

On this page:

What is radon?

Radon is an invisible and odorless gas that comes from the ground. It can enter buildings and sometimes build up to high levels. Radon is the second leading cause of lung cancer after smoking.

Why join the study?

You will learn about the radon levels in your workplace. Testing for radon is the only way to know how much radon is present. Eligible participants will receive free radon testing for their workplaces.

We don’t know a lot about radon levels in Ontario workplaces. Most research has been done in homes or mines. Join our study to help expand our knowledge of radon!

How can I participate?

We are looking for:

  • public buildings or small businesses
  • with workers in the basement or first floor
  • located in one of these cities:
    • Brantford
    • Chatham-Kent
    • Elliot Lake
    • Guelph
    • Kingston
    • Ottawa
    • Sudbury
    • Toronto
    • Windsor
    • Woodstock

Fill out this survey to see if your workplace is eligible to participate in our study.

What will I be asked to do?

To participate, you will need to fill out our eligibility survey. If your business is eligible, one or more radon detectors will be placed in your workplace during the wintertime for three months. After three months the detector will be retrieved, and you will be asked to fill out a second survey and answer questions about your building (e.g., age of the building, type of heating system). The detector will be shipped to a lab and analyzed, and you will receive your radon results a few months later. We will also share the overall study results with you when the study is complete. We will not identify you, your business, or any other participants when we share these results.

For more info

Contact the study coordinator, Lily Yang ( or email OCRC (

Visit our project summary page and see our frequently asked questions document (EN/FR) for more information.