About RTCA About RTCA RTCA , Radon Testing Corporation of America, Inc has been providing radon testing services since 1986. We have been rated the #1 Radon Laboratory by Ralph Nader's Consumer Advocacy Group, Public Citizen and have received high ratings from our professional and government clientele. This section describes RTCA 's qualifications and background, lists RTCA 's national and state certifications and provides information about the RTCA management team.
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