Opening your windows may temporarily lower indoor radon levels, but it is not a reliable solution. Learn why ventilation, air purifiers, crack sealing, and other common approaches do not replace proper radon testing and mitigation.

Every conversation about radon eventually arrives at the same underlying reality: the risk begins in the ground. The geology beneath Michigan — the specific composition of the soil, rock, and glacial deposits that form the foundation of the landscape — is the source of the radon that enters homes across the state. Understanding what Michigan's geology actually looks like, why it produces radon at the levels it does, and why certain parts of the state carry higher risk than ot