EPA OIG: “EPA does not perform oversight of radon testing device accuracy or reliability. The 1988 Indoor Radon Abatement Act required that EPA establish proficiency programs for firms offering radon-related services, including testing and mitigation. EPA established and operated proficiency programs until 1998, when it disinvested in these programs. According to Agency representatives, EPA has neither the authority nor resources to ensure radon testing devices and testing laboratories are accurate and reliable. EPA asserts that it shares oversight responsibility with States and industry, including the two national proficiency programs operating under private auspices. However, without oversight, EPA cannot assure that radon testing devices provide accurate data on indoor radon risks or that radon testing laboratories accurately analyze and report radon results.” At a Glance | Report