Our mission
Public radon test data exists for many states but sits in scattered portals, maps, and reports. We built Radon by County to make verified county results easier to compare. We add states only after their data can be sourced, validated, and attributed without inventing missing values.
Independence
Radon by County is an independent site. We are not affiliated with the EPA or any state agency. We earn commissions from affiliate links, currently with Airthings. Every affiliate link is labeled "Sponsored". If we add other revenue, such as advertising, we'll list it on ouraffiliate disclosure first.
What we don't do
- No medical advice, and no claims about any individual home's radon level.
- No address-level data and no personal data about test subjects.
- No user accounts, reviews or forums at launch.
- No contractor marketplace, and we don't sell anyone's contact details.