You may be being exposed to high degree of radon under the incorrect pretense that you are risk-free since you have a mitigation system if you do not execute routine follow-up testing. Keeping that said, most radon mitigation systems mounted by great contractors will certainly work excellent to decrease radon levels. The Epa has suggested that property owners placed radon displays in their basements, where levels of the odorless gas are probably the highest possible. It is the first research to see how much radon people are exposed, instead of just how much is found in part of a residence.