Abstract
Radon inside homes poses a significant public health threat. A geographical assessment of the hazard using indoor radon data from 489 homes in Lancaster County, Pennsylvania, USA showed statistical associations between radon, house characteristics and environmental conditions. A geographical information system (GIS) in conjunction with non-parametric statistical analyses is used to assess risk factors. Soil and geological characteristics are strongly associated with indoor radon concentrations. Age of housing exhibits a strong inverse association with elevated radon levels which remains significant regardless of location; however, many newer houses are located in areas of high radon potential. Construction features common in newer homes, such as blockwall foundations and French and perimeter drains, are associated with higher radon levels. The spatial perspective taken, enhanced by GIS technology, contributes to the ability to record, observe and assess the complex relationships that create an indoor radon hazard.
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