In deciding about remedial action, the risk of exposure as well as the benefits and costs of the remedial actions, including those over the long term, should be considered. However, possible risks to the family's health should always be the primary concern. The presence of children might encourage remediation of radon levels. The EPA conducts the Radon Measurement Proficiency Program to evaluate companies that make and analyze test kits. Therefore, to ensure the public gets accurate results, people should look for a company that has successfully completed the Proficiency Program.
Most companies indicate approval on the test kit box.
In addition, many states require licensing of radon testing companies and contractors. State radon offices have a list of all radon measurement companies that are state or EPA approved. When radon testing indicates elevated radon levels, a trained contractor should be consulted to correct the problem. EPA conducts a Radon Contractor Proficiency Program to evaluate contractors' ability to reduce radon levels. The names of these contractors appear in a national listing.