Radon mitigation systems are designed to significantly reduce radon levels in a home, but it is important to note that they may not completely eliminate radon. The goal of radon mitigation is to bring radon concentrations below the recommended action level set by health authorities, typically 4 picocuries per liter (pCi/L) or lower. Mitigation systems, such as sub-slab depressurization or crawl space ventilation, work by creating a pressure differential that prevents radon from entering living spaces or directs it safely outside. Regular post-mitigation testing is recommended to ensure that radon levels remain within acceptable limits. While mitigation systems are highly effective, it's important to understand that radon is a naturally occurring gas and can still exist at low levels in the environment. Continuous monitoring and periodic testing can help maintain a safe and healthy indoor environment.