Since 1988 Radon Testing Labs, Inc. (RTL) has been synonymous with quality and service. We are the largest full-service radon company in North Carolina, offering both radon monitoring and radon remediation. RTL is owned and operated by Dr. Zygmunt C. Gromadzki, who received his Ph.D. in Nuclear Physics from the University of Virginia. He is certified by the American Board of Radiology and has spent over 20 years in the treatment of cancer patients using radiation therapy. Dr. Gromadzki is a recognized expert in radiation, radioactive materials, radiation safety, and is the author of numerous publications on these subjects. Our team boasts a collective 50+ years of radon testing, analysis, and mitigation experience.