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What is radon?

Radon is a radioactive gas that occurs naturally from the breakdown of uranium in soil, rock, and water. Radon occurs throughout the United States, is common in Wisconsin soil, and may be present in any type of building.

As radon gas decays, it releases small bursts of radioactive energy that can damage lung tissue. Radon can cause lung cancer. The Surgeon General warned that radon is the second leading cause of lung cancer in the U.S. preceded only by smoking. You cannot see, smell, or taste it, but radon may be present at your site.

Expertise and Experience

  • Measurement – The Sigma Group personnel are certified in residential and multi-family radon measurement protocols and have extensive experience performing radon sampling in residential, institutional and commercial buildings.
  • Mitigation – Sigma personnel are certified in radon mitigation.
  • Certification – Sigma personnel are certified by the American Association of Radon Scientists and Technologists (AARST) and the National Radon Proficiency Program (NRPP).

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