Final answer:
Radon measurement results provide critical information on the radon levels in a building, and actions should be taken if levels are at or above 4 pCi/L due to the health risks, such as lung cancer. Testing for radon is the only way to detect the gas, as it is colorless and odorless.
Step-by-step explanation:
Radon measurement results obtained by the tester on behalf of a property owner should be indicative of the radon levels within the building. Radon is a radioactive gas that comes from the natural decay of uranium found in almost all soils, and it can seep into buildings from the ground. Since radon gas is colorless and odorless, testing is the only way to determine the concentration in a home or building. The EPA recommends action to reduce radon levels when measurements show radon concentration at or above 4 pCi/L, as exposure to high levels of radon increases the risk of lung cancer, being especially hazardous to smokers. It is important to carry out radon testing as it is the leading cause of lung cancer among nonsmokers and is responsible for about 20,000 deaths in the US annually.