Radon Information

What is Radon

Radon Brochure - What You Need to Know

Radon is a gas that is formed by the breakdown of uranium, a natural radioactive material found in soil, rock and groundwater

When radon is released from the ground into the outdoor air it gets diluted to low concentrations and is not a concern. However, in enclosed spaces such as a home, radon can sometimes accumulate to elevated levels, which can present a health risk with long-term exposure.

Where a home touches the ground, radon can get in anywhere it finds an opening including: cracks in the foundation, spaces around pipes, sump holes and floor drains, etc.

illustration of radon getting into the house

Key messages about radon

    1. Long-term exposure to high levels of radon increases your risk of lung cancer 
    2. The only way to know the level of radon in your home is to test for it. Test the lowest lived-in level of your home where occupants spend more than four hours per day
    3. If your home tests above Health Canada's guideline of 200 Bq/m3, Region of Waterloo Public Health recommends that measures be taken to lower the amount of radon entering your home, and that a certified radon mitigation professional be consulted for home  remediation options.

Read more to find out how to test your home for radon and how to find a certified radon mitigation professional if needed.

Protect yourself from radon

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Reducing Radon in Your Home
Health Canada

open file Radon_brochure.pdf

Links and Resources

Radon Brochure - What You Need to Know

Radon: Is It In Your Home?

Radon - Is It In Your Home? Info For Health Professionals 

Radon - What You Need To Know 

Radon - Another Reason To Quit

Reducing Radon Levels in Existing Homes - A Guide For Professional Contractors 

Health Canada- Radon Frequently Asked Questions 

Cross-Canada Survey of Radon Concentrations in Homes - Results-
- Here you will find a summary of the results from the Cross-Canada Survey of Radon Concentrations in Homes, a two-year study conducted by Health Canada's National Radon Program. The study estimated that 7% of homes sampled in Canada and 8.2% of homes sampled in Ontario had radon concentrations above the Health Canada guideline of 200 Bq/m3. In Waterloo Region, there were 101 homes tested and four homes (approximately 4%) were above the guideline.

For more information contact Region of Waterloo Public Health, Health Protection and Investigation Information Line at 519-883-2008 ext. 5147.