Radon tests should be conducted in which location inside a home?

Radon tests should be conducted in which location inside a home?

• A. The lowest level in the house
• B. The highest level in the house
• C. The middle level
• D. The attic

Answer: (A)

Radon is a soil-derived gas that tends to accumulate in the lowest parts of a building that are in contact with the ground. To get a realistic picture of the air people actually breathe over time, testing should be done on the lowest level that is or will be used for living. If there is a basement, test there; if not, test the lowest occupied level. Testing a attic or the highest level would not reflect typical exposure because radon concentrations are usually much lower up higher, where there is less soil contact and more ventilation.

Radon is a soil-derived gas that tends to accumulate in the lowest parts of a building that are in contact with the ground. To get a realistic picture of the air people actually breathe over time, testing should be done on the lowest level that is or will be used for living. If there is a basement, test there; if not, test the lowest occupied level. Testing a attic or the highest level would not reflect typical exposure because radon concentrations are usually much lower up higher, where there is less soil contact and more ventilation.