Living in a newer home in Eastern Washington does not eliminate the risk of having elevated radon levels, even though building construction codes have required radon mitigation for nearly 20 years. Washington adopted radon control standards in 1992 for new dwellings in “hot” counties, but Mark Gerard, co-owner of Advanced Radon Technologies in Spokane, said those standards are hardly a cure considering that many homes still have serious radon problems even with radon mitigation systems.