Radon is a radioactive gas found in nearly every Canadian home. A new research study is putting a renewed spotlight on the invisible, odourless element that is the second-leading cause of lung cancer in Canada.
Researchers from the University of Calgary compiled radon readings from 75,000 urban and rural residential buildings. The countrywide study found that an estimated 10.3 million Canadians live in homes with levels above Health Canada鈥檚 guidelines.
There are multiple ways to combat Radon in your home. You can order a free test kit by going to to test the levels in your home over a three month period. If your levels are high, then radon reduction strategies are recommended. This includes having a system installed in your home that pulls the radioactive gas out of your house.
Radon forms naturally when radioactive metals break down in rocks, soil and groundwater. Exposure comes from breathing in the gas that leaks through the cracks and gaps in our homes.
When high levels of radon are inhaled, 鈥渋t increases the risk of developing lung cancer by causing DNA damage at the cellular level,鈥 said oncologist Dr. Doreen Azeife.
Azeife also pointed out that 鈥渢he data shows that up to 40 per cent of lung cancers are not smoking related.鈥
The last radon report was released in Canada more than a decade ago. In 2012, about seven per cent of homes had Radon readings above Health Canada's guidelines. This year, that percentage spiked to 17.8 per cent.
The study鈥檚 lead researcher, Dr. Aaron Goodarzi, has a hypothesis for why we鈥檙e seeing a rise in radon levels in homes across Canada.
鈥淲hat has changed is how we've been building on top of the ground: retrofitting existing properties to make them more airtight, but without necessarily balancing the amount of fresh air the home can intake and the stale air that is released.鈥
Dr. Goodarzi added that, 鈥渋f you don't balance (the intake and outtake of air) correctly, the house will balance that out by sucking on the ground鈥 where radon is found.
Dr. Goodarzi adds that more homes in rural communities were found to have high radon levels, about one-in-four, as opposed to those in cities. In the City of Calgary, for example, he says about one-in-six homes were found to have levels of radon above what has been deemed safe by Health Canada.
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