| Summary: | Radon and thoron are radioactive gases that are found naturally in the environment. They can seep into homes through cracks in the foundation, walls, and floors. Once inside, they can build up to levels that are harmful to human health.
A study of radon and thoron concentrations in 65 homes in the Beni Mellal province of Morocco found that the levels varied widely, from 16 to 304 Bq.m-3 for radon and from 1 to 25 Bq.m-3 for thoron. The concentrations were found to be influenced by a number of factors, including the type of home, ventilation conditions, and the geological materials in the area. The average estimated dose received by the public due to radon and thoron in the homes studied was 45 ± 0.28 mSv.y-1 and 0.20 ± 0.01 mSv.y-1, respectively. These doses are considered to be low-level radiation exposure, but they can increase the risk of cancer over time. These results suggest that it would be beneficial to prohibit the construction of houses near industrial areas and to use construction materials that are adapted to the criteria of dose limitation.
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