Radon can be easily prevented from entering into most properties. This is usually quick (1-2 days’ work) and, even for the most drastic (but effective) of interventions, it still only costs about the same as replacing a few windows. The important thing to recognize is that determining if your home has high radon will not devalue your property, as it is so easily solved. Homes that have been ‘mitigated’ for high radon tend to have the lowest achievable levels – and have amongst the healthiest of indoor air. In other parts of the world, a radon mitigation device is seen even as a selling feature. When considering a mitigation, always find someone with C-NRPP (Canadian National Radon Proficiency Program) certification. C-NRPP certification is approved of by Health Canada.
Should I have my home mitigated?
Any level above 100 Bq/m3 represents a statistically significant increase in the lifetime relative risk of lung cancer for those being exposed chronically to it. Indeed, the WHO deferred to the amount of radon where a statistically observable increasing in lifetime risk of lung cancer is clear and significant – this is 100 Bq/m3. Health Canada set our “maximum exposure limit” reference level at twice this value, with the view that double where we start to see an increase in risk is truly unacceptable.
To ensure that you are protected to where there is no significant increase in risk (as science and medicine understands radon), aim to get your home, school and work environment below 100 Bq/m3. It is important to remember that the 200 Bq/m3 level is set by Health Canada as a maximum acceptable reference level. Health Canada’s advice is to aim for as low as reasonably achievable. Your body cannot distinguish between 199, 200 and 201 Bq/m3 of radon, and being slightly under or over that number is meaningless to your long term health. Our advice if your home is at or near 200 Bq/m3 is to evaluate your relative risk and exposure by asking yourself the following questions:
- Are there babies, kids or teens in the home? If yes, consider mitigating, as young people are at a much higher risk from the negative impact of radon compared to those of older ages (65+).
- Does anyone work from home or spend most of there days at home? If yes, then consider mitigating, as those individuals are breathing the home’s air for a lot longer than a person leaving for large parts of the day for school or work.
- Does anyone in the home have a family history of cancer? If yes, consider mitigating, as some families carry altered genes that make them more susceptible to cancer following exposure to radiation.
- Is anyone in the home a current or former smoker? If yes, consider mitigating. The risk of lung cancer from radon is ‘synergistic’ with the risk from smoking. For example, ‘1 unit’ of risk from smoking plus ‘1 unit’ of risk from radon does not equal 2, rather it is a case of 1+1=17. Smokers (current or former) are much more at risk from radon, and so should protect themselves from radon even if still actively smoking to reduce their chances of cancer in the future.
- Is anyone in the home exposed to other lung cancer risk factors? If yes, consider mitigating. In addition to smoking (described above), folks who work with or who are exposed often to metal dust (metallurgists, jewelers, machinists, blacksmithery, etc.), leather dust, gasoline or diesel fumes (mechanics, firefighters, etc.), asbestos and heavy air pollution should also aim to reduce their exposure to radon as much as possible.