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Attention (July 1st, 2025 - present): Update on Potential Canada Post Strike. 

The Canadian Union of Postal Workers (CUPW) has initiated strike action, including a nationwide overtime ban. On June 16th, CUPW members were asked to vote on Canada Post’s comprehensive offer to CUPW.

As this situation continues to evolve, the Evict Radon National Study continues to take precautionary steps to minimize disruptions caused by any interruptions in postal service. Radon test kits will continue to be shipped out until a potential strike has officially commenced. Return shipping may be affected, and we are recommending that participants continue to test until the situation is resolved. Read more about return shipping here. 

Radon Research Series

Understanding radon as a function of building air dynamics

Radon Research Series

Inhalation of radioactive radon gas within the built environment is a leading cause of lung cancer, with Canadian exposures being amongst the highest globally. All areas of Canada have proven to have the risk of long-term lung irradiation with cancer-causing doses (100 Bq/m³ or higher) of radon.

Differences within the built environment are a primary driver of radon level differences between properties, with newer and larger residential homes with fewer storeys containing even higher levels than older, smaller, and multi-storey equivalents. Largely, the way a given residential property ‘breathes’ – meaning the dynamic manner in which fresh and stale air is exchanged and moves within a home – is a critical factor in why some homes have high radon and others (perhaps right next door) have low radon.

Over the past five years, we have identified nearly a dozen separate property metrics that work together to influence building air dynamics and radon levels.

These include the status of, but not limited to:

  • Windows
  • Chimneys
  • The Roof
  • Insulation
  • Heating Type

By understanding this in detail, we are working towards a more effective way of risk prediction and (potentially) points of modification to ‘radon-proof’ future properties.

Related Blog Content Scientific Reports (2021) Scientific Reports (2019) Survey Report (2017)
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