Radon is a naturally occurring radioactive gas that seeps from the ground into homes. It's colourless and odourless, and long-term exposure to high levels is a leading cause of lung cancer. Parts of BC's interior have elevated radon, so testing is the only way to know your home's level.
Why test
You can't see or smell radon, and levels vary house to house even on the same street. The only way to know is to measure. Health Canada recommends acting if levels exceed the national guideline.
How to test
A long-term test kit (placed for at least three months, ideally over winter when homes are closed up) gives the most reliable reading. Kits are inexpensive and available online or through public-health programs. Place the detector in the lowest lived-in level.
Reducing radon
If levels are high, a radon mitigation system — typically a sub-slab depressurization pipe and fan that vents the gas outside — reliably lowers them. A certified radon professional sizes and installs it.