Regional variations were much more significant. Five radon zones were established based on predicted average concentrations. Zone 2 (37–74 Bq/m 3) cuts across the country, keeping just south of ...

Most Western Pennsylvania counties are in radon zones 1 or 2, according to the EPA, meaning they have the highest potential for elevated indoor radon levels. In fact, 40% of Pennsylvania homes ...

And Meeker County is in the middle of a high-radon zone, which means radon testing should be taken seriously. A study done at St. John’s University a few years ago estimated between 500 and ...