Many homeowners are able to install simple measures to reduce radon levels. Your state radiation protection office or regional EPA office should be able to provide you with this information. However, you may decide that you need a professional contractor to handle radon reduction or mitigation techniques in your home. Because there may be a significant amount of money involved in correcting high radon levels in your home, you should carefully select a contractor. Many state radon protection offices will offer a list of contractors doing radon mitigation work although they usually do not endorse any contractor or company.
Some states have certification programs for radon measurement and mitigation.
The EPA has a voluntary Radon Measurement Proficiency Program that allows laboratories and businesses to demonstrate their ability in measuring indoor radon. You can contact your state radon protection office for this list. Be sure to check the name of any contractor that approaches you at your home with the names on this list. Getting a second opinion from another contractor may help you decide if the first estimate is reasonable. It is important that you ask the contractor of your choice for a written estimate as well as what work will be done.