Canadians warned of increased radon danger

A new report has found that nearly 18% of Canadian homes suffer from levels of radon that are over the threshold at which Health Canada recommends people take remedial action. Prior to this report, that figure was thought to be 7%.

Across the world, radon exposure is linked to around 222 000 of the 1.8 million lung cancer cases reported per year. It is the highest cause of lung cancer among non-smokers. 

Aaron Goodarzi (standing) and Dustin Pearson look at human cells damaged by radon in the Environmental Cancer Research Hub, University of Calgary.

The new figures from Canada are revealed in the 2024 Cross-Canada Survey of Radon Exposure in the Residential Buildings of Urban and Rural Communities, which describes the situation as a ‘critical public health concern’ with over 10 million Canadians living in houses affected by high radon levels

Dr. Pawel Mekarski, PhD, head of the Radon Technical Operations Section for Health Canada’s National Radon Program said: ‘In the 12 years since we released the first Cross Canada Radon Report, evidence has continued to emerge showing that the number of high-radon homes has been increasing. The 2024 survey represents a more up-to-date snapshot of radon levels across the country, highlighting the importance of protecting Canadians from residential radon exposure.’

Radon is a naturally occurring gas, formed by the radioactive decay of uranium, which is present in varying concentrations below ground  in certain rocks and soils. When it seeps into the open air it dissipates harmlessly but it can also permeate through stone into homes, particularly where a lot of surface area is in contact with soil such as in cellars.

As it is entirely odourless, the only way to detect the presence of radon is through testing, something the UK Radon Association are keen to promote over here. 

Dr Maria Dugdale, Chair of the Association says: ‘Nowadays, people are diligent about installing smoke alarms and carbon monoxide detectors in their homes because they recognise the immediate dangers that these devices can protect their families from.

‘Similarly, we are all well-versed in needing to open windows when we’re decorating or using strong cleaning chemicals to avoid inhaling fumes. Yet many don’t consider the risks posed by radon. Whilst it’s a less obvious risk and requires some research to establish whether it could affect your home, addressing it is just as crucial for maintaining a safe and healthy living environment.’

UK Radon Awareness Week takes place from 4-10 November