How often should post-mitigation radon testing be retested?

Post-mitigation radon testing is typically suggested to be performed every two years. This recommendation is grounded in ensuring that the radon levels remain low after mitigation has been completed. Radon is a naturally occurring radioactive gas that can fluctuate in concentration based on various factors, including changes in weather, moisture levels, and the condition of the mitigation system itself.

Regular testing every two years helps homeowners confirm that the mitigation system continues to function effectively and maintains reduced radon levels in the indoor environment. This time frame balances the need for consistent monitoring without imposing an excessive burden on homeowners, thus promoting health and safety by allowing for timely action if radon levels were to rise.

More frequent testing, such as annually, could be too frequent for many homeowners, while longer intervals such as every five or three years may not adequately ensure that any changes are detected in a timely manner. Therefore, the two-year timeframe is designed to provide an effective balance for monitoring radon levels post-mitigation.