The following links should be of use for more radon information. We listed the sites with some of the best information regardless if this may lead you to other testing or mitigation companies because we believe we offer the best warranties and service in Illinois. We hope, if you should need radon service in the future you will contact us for an estimate.
National Radon Safety Board (NRSB)
The NRSB seeks to encourage the highest standards of practice and integrity in radon services through the development of independent standards and procedures for certifying. If you need a Tester or Mitigator outside of Illinois, then look here.
American Association of Radon Scientists and Technologists, Inc.
AARST is a nonprofit, professional organization of members who are dedicated to the highest standard of excellence and ethical performance of radon measurement, radon mitigation and transfer of radon information for the benefit of members, consumers and the public at large.