A colorless and odorless gas called radon, known for causing cancer, can be found in numerous Canadian households. Recent data from federal sources indicate that approximately one in five residential properties in Canada have elevated radon levels, a number that has more than doubled since the late 2000s. This hazardous radioactive gas seeps into buildings from the ground, with modern construction and renovations contributing to increased exposure among Canadians.
Pawel Mekarski, the head of radon technical operations at Health Canada, explained that the trend of enhancing building airtightness during renovations without proper ventilation mechanisms could be a factor in the rise of radon exposure in homes. The national building code, updated in late December, now mandates the inclusion of a passive radon stack in newly constructed homes to help reduce indoor radon accumulation, although provincial and territorial adoption of this requirement is still pending.
To determine if a home has high radon levels, experts recommend conducting radon testing. This can be done by hiring a professional for measurement or purchasing a test kit. Health Canada advises testing the home for a minimum of 91 days, preferably during the colder months when windows and doors are often closed, trapping more radon indoors.
For homes exceeding the acceptable radon threshold of 200 becquerels per cubic meter, the Take Action on Radon program offers a directory of certified radon professionals who can install mitigation systems. These systems typically involve a pipe running from the foundation floor to the roof with a fan to expel radon outside. Costs for mitigation, ranging from $2,000 to $5,000 or more, are usually the responsibility of homeowners, with limited financial support available through various programs in different regions.
The Canadian Lung Association acknowledges that the expense of radon mitigation can be prohibitive for many households, leading to delayed action. The association offers a grant program for low- and middle-income families to help cover mitigation costs, albeit with limited capacity. Experts emphasize that investing in radon mitigation is crucial for safeguarding families, as early detection and mitigation can prevent health risks associated with long-term exposure to high radon levels.