What is Radon?
A colourless, odourless radioactive gas found naturally in the environment, Radon is produced by the natural breakdown of uranium commonly found in Ontario soils and rocks. As a gas, Radon can easily move through small spaces in soils and other materials, allowing it to enter buildings. Radon gas is approximately 7 to 8 times heavier than air, and tends to accumulate in low, poorly ventilated areas such as basements or crawl spaces. If radon accumulates to high levels, it can pose a risk to health.
It is estimated that about 16% of lung cancers in Canada are related to radon exposure. This has prompted concern that radon levels in some Ontario homes, workplaces and buildings may pose a health risk. The level of risk depends on:
- the amount of radon present
- the length of exposure
- whether or not you smoke