Radon levels in most homes should be reduced to as low as reasonably achievable. The age of your home is not a good indicator of how high indoor radon levels could be – the only way to know how much radon is in your home is to test.
The Canadian Cancer Society recommends that Canadians test their homes for radon and take action to reduce high levels.
To test your home for radon, you can purchase a test kit at some hardware stores, or online from several organizations working to reduce radon. You can also hire a certified professional to perform a test for you. Find out more about how to test for radon in your home.
Health Canada’s radon action guideline is 200 Bcq/m3, but other jurisdictions have set different limits. The World Health Organization (WHO) recommends a limit of 100-300 Bcq/m3, and the United States has a limit of 148 Bcq/m3.
If the level of radon is above 200 Bcq/m3, you should work with a C-NRPP certified professional to lower the levels in your home. However, even if the radon levels are below 200 Bcq/m3, you may still want to take action to lower the levels in your home.