In areas where radon is a concern, which location presents the highest risk?

Radon is a naturally occurring radioactive gas that can accumulate in buildings, particularly in areas that are in direct contact with the ground. The highest risk for radon exposure typically occurs in basements for several reasons.

Firstly, basements are often situated below ground level, which places them in proximity to the soil and the bedrock where radon is generated. Since radon emanates from the decay of uranium in the earth, its concentration is generally higher closer to these sources. Additionally, basements often have lower ventilation compared to upper levels of a home, allowing radon to accumulate to dangerous levels.

The characteristics of basement construction—such as concrete walls and floors—can also contribute to radon build-up, as these materials can trap radon that seeps in through cracks, gaps, or other entry points. In contrast, upper levels or areas that are ventilated, such as first-floor washrooms or attics, experience better air circulation, which can help dilute radon concentrations.

Thus, because of their location and typical conditions, basements present the highest risk for radon exposure, making them the critical area to monitor and mitigate if necessary.