Radon tests should be conducted in which part of the house?

Radon tests should be conducted in which part of the house?

• A. The attic
• B. The lowest level
• C. The highest level
• D. Any level

Answer: (B)

Radon is a soil gas that seeps into buildings from the ground, and it tends to accumulate in the lower parts of a house where air from the soil can pool and where occupants spend time. To gauge the level of exposure most people experience, tests should be conducted on the lowest level that is regularly used—typically a basement or the first floor. Testing on the attic or the highest level can miss higher concentrations closer to the soil and won’t reflect the actual exposure of occupants who live on the lower levels. If multiple levels are inhabited, choose the lowest level that people spend significant time on to obtain an accurate reading.

Radon is a soil gas that seeps into buildings from the ground, and it tends to accumulate in the lower parts of a house where air from the soil can pool and where occupants spend time. To gauge the level of exposure most people experience, tests should be conducted on the lowest level that is regularly used—typically a basement or the first floor. Testing on the attic or the highest level can miss higher concentrations closer to the soil and won’t reflect the actual exposure of occupants who live on the lower levels. If multiple levels are inhabited, choose the lowest level that people spend significant time on to obtain an accurate reading.