If anyone knocks on your door offering to test your home for radon, there probably is something wrong if they say they will give your results immediately. Finding out results usually takes time. If the person says they use a Geiger counter to give you results, be wary. Geiger counters cannot test the radon level in your home. Check with your local business license office.
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.