What is the recommended action when high radon levels are detected in a home?

When high radon levels are detected in a home, implementing radon mitigation measures is the recommended action. High radon levels, particularly those at or above the action level of 4 pCi/L, pose a significant health risk due to the potential for causing lung cancer. The immediate priority is to ensure the safety and health of the occupants by effectively reducing the radon levels.

Radon mitigation systems are designed to lower radon concentrations in the home, often through methods such as ventilation, sealing cracks in floors and walls, or installing radon-specific systems that draw radon from beneath the home and vent it outside. Taking action promptly not only protects current occupants but also serves anyone who may live in the home in the future.

Other options do not address the immediate health risks posed by high radon levels. For instance, ignoring results under certain thresholds could lead to long-term exposure risks if levels fluctuate or increase over time, and merely retesting would not mitigate the immediate dangers. Reducing indoor humidity may help with overall air quality but does not significantly impact the radon levels themselves or provide the necessary mitigation to ensure safety.