How Low Should Radon Levels Be After Mitigation?

August 20, 2026      

After installing a radon mitigation system, the goal is to reduce indoor radon levels as much as reasonably achievable. The U.S. Environmental Protection Agency (EPA) recommends taking action when radon levels are 4.0 pCi/L or higher. However, because there is no known completely safe level of radon exposure, lowering radon levels below 4.0 pCi/L is an important goal whenever possible.

A properly designed and professionally installed radon mitigation system can significantly reduce radon concentrations inside your home. The amount of reduction can vary depending on factors such as your home's construction, foundation type, soil conditions, and the original radon level. Some homes may achieve levels well below 4.0 pCi/L after mitigation, while others may require additional adjustments or mitigation strategies.

Post-mitigation radon testing is essential for determining whether your system is working effectively. Testing after installation provides a clearer picture of your home's current radon level and can help identify whether additional work is needed. Regular radon testing is also recommended because radon levels can change over time.

At The Radon Guys, we help homeowners understand their radon levels and find effective solutions for reducing elevated radon concentrations. Whether you need radon testing, radon mitigation, or post-mitigation testing, our team can help you take the appropriate steps toward a healthier indoor environment.

Contact The Radon Guys today to learn more about protecting your home from radon.

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