What is the Canadian guideline for radon in indoor air?
A. The Canadian guideline for radon in indoor air for dwellings, which provides Canadians with guidance on when remedial action should be taken to reduce radon levels, is as follows: “Remedial measures should be undertaken in a dwelling whenever the average annual radon concentration exceeds 200 becquerels per cubic metre (200 Bq/m³) in the normal occupancy area. The higher the radon concentration, the sooner remedial measures should be undertaken. When remedial action is taken, the radon levels should be reduced to a value as low as practicable. The construction of new dwellings should employ techniques that will minimize radon entry and will facilitate post-construction radon removal, should this subsequently prove necessary.” The becquerel is a unit of radioactivity. One becquerel corresponds to one disintegration per second.
A. The Canadian guideline for radon in indoor air provides Canadians with guidance on when remedial action should be taken to reduce radon levels. The Canadian Guideline is as follows: “Remedial measures should be undertaken in a dwelling whenever the average annual radon concentration exceeds 200 becquerels per cubic metre (200 Bq/m³) in the normal occupancy area. The higher the radon concentration, the sooner remedial measures should be undertaken. When remedial action is taken, the radon levels should be reduced to a value as low as practicable.
