What is the current Canadian guideline for radon in indoor air?
The current Canadian guideline for radon in indoor air for dwellings is 200 Becquerels per cubic metre (200 Bq/m3). The Becquerel is a unit that describes one radioactive disintegration per second. Individual dwelling owners may wish to reduce radon levels as much as they reasonably can, using methods they find affordable and practical. However, the level in a dwelling should not be above the Canadian guideline of 200 Bq/m3. Radon in indoor air is a concern especially if it accumulates in enclosed spaces. Examples of dwellings are residential homes, or public buildings such as schools, hospitals, long‑term‑care residences and correctional facilities. Workplaces are also subject to guidelines for radon. In Nova Scotia, workplaces are covered under the Occupational Health and Safety Regulations. For more information about radon levels in the workplace, please contact the Occupational Health and Safety Division of Nova Scotia Labour and Workforce Development.
