What is the best course of action if a real estate transaction shows a short-term radon concentration of 35 pCi/L?

When a short-term radon concentration of 35 pCi/L is detected, it indicates a significant potential health risk, as this level is well above the Environmental Protection Agency's (EPA) action level of 4 pCi/L. The best course of action in this scenario is to install a radon mitigation system, specifically a combination of sub-slab and sub-membrane depressurization systems.

This approach is effective in reducing radon levels within the home, addressing the immediate concern of elevated radon exposure. The sub-slab depressurization system works by creating a vacuum beneath the foundation, effectively drawing radon gas from the soil and venting it outside. Meanwhile, the sub-membrane system is often necessary in homes with crawlspaces, where a vapor barrier is installed to minimize radon entry.

Opting for mitigation right away ensures that the property is safe for occupants and aligns with best practices for handling high radon levels. It demonstrates a proactive response to environmental health concerns rather than delaying action which could lead to continued exposure.

Addressing what others might suggest, doing nothing could leave the inhabitants at risk for long-term health issues associated with radon exposure. Selling the house as is would not mitigate the danger and could