Final answer:
To reduce radon levels in a home, it's essential to test for radon and, if necessary, install a ventilation system that diverts radon from the ground before it enters living spaces. The EPA recommends fixing homes with radon levels at or above 4 pCi/L to minimize health risks.
Step-by-step explanation:
Radon is a naturally occurring radioactive gas that can enter buildings through various means, including soil, well water, and building materials. It is denser than air, which causes it to accumulate in lower levels of buildings, particularly basements. Testing for radon is crucial as it is the only way to know if a home has high levels of this gas, which is a leading cause of lung cancer in nonsmokers and the second leading cause overall. The EPA recommends remediation when radon levels are at or above 4 pCi/L.
To mitigate radon in a home, specially designed ventilation systems can be installed. These systems typically involve a fan-and-vent system that draws air from beneath the basement floor and expels it above the roof, preventing it from entering living spaces. This is effective because it tackles radon accumulation at its source, before it can infiltrate indoor air. While we cannot completely avoid radon due to its origin in the ground, with proper ventilation and remediation efforts, we can significantly decrease radon levels in our homes to protect our health. Regular monitoring and maintenance of mitigation systems are necessary to ensure ongoing protection against radon exposure.