Radon on the RADAR (Residents Acting to Detect and Alleviate Radon) 2.0

Inclusion Criteria: * Rural resident participants must be a homeowner or the primary decision maker in the home. * Rural resident participants must live in a rural area, defined as residence in a rural-urban community area (RUCA) with a code of 4-7. * Rural resident participants must be able to read and speak english. * Participants in the radon messaging groups will include individuals who have never tested their home for radon and individuals whose home has tested high for radon but have not mitigated their home. Exclusion Criteria: * For rural resident online study, individuals who are not a homeowner or primary decision maker in the home, do not live in a qualifying rural area, or do not have internet access.