INDOOR RADON HAZARD - A GEOGRAPHICAL ASSESSMENT AND CASE-STUDY

Radon inside homes poses a significant public health threat. A geograp hical 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-parametr ic statistical analyses is used to assess risk factors. Soil and geolo gical characteristics are strongly associated with indoor radon concen trations. Age of housing exhibits a strong inverse association with el evated radon levels which remains significant regardless of location; however, many newer houses are located in areas of high radon potentia l. Construction features common in newer homes, such as blockwall foun dations and French and perimeter drains, are associated with higher ra don 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.