Harvey Township sits in EPA Zone 1, the highest risk classification for radon exposure in Pennsylvania. The Back Mountain's geological story spans millions of years, beginning when ancient seas deposited uranium-rich sediments that would eventually form the Allegheny Group shales and sandstones underlying Harvey today. These uranium-bearing rock formations continuously generate radon gas as uranium naturally decays, creating a persistent source of radon beneath Harvey homes.
During the last ice age, glaciers carved through the Back Mountain area, dramatically fracturing the bedrock and depositing varied glacial till across Harvey Township. These glacial processes created an extensive network of cracks, fissures, and permeable soil layers that now serve as pathways for radon migration. Where solid bedrock once blocked radon, glacial activity opened superhighways for gas to travel from deep uranium deposits directly into home foundations.
Harvey Township's unique lakeside geography adds complexity to radon patterns. Properties around Harveys Lake often feature walkout basements and crawl spaces designed for sloped terrain, creating multiple entry points for radon accumulation. The varied soil conditions - from dense glacial clay to permeable sand and gravel - mean radon concentrations can vary dramatically even between adjacent properties.
Professional making certified radon mitigation systems essential for home safety throughout the township.