Groundwater Radon-222 Concentrations in Antelope Creek, Idaho: Measurement and Interpolation

摘要

Groundwater samples were collected from eight wells in remote Antelope Creek valley, Idaho. Seven out ofeight locations showed that groundwater 222Rn concentrations were much greater than 11 Bq/L (300 pCi/L), a maximum contaminant level (MCL) proposed by United States Environmental Protection Agency (USEPA).Rock and soil samples collected near the sampling wells revealed that 238U contents were between 0.55 to 6.41 ppm. Mineralscollected from different regions of the country with similar 238U contents also showed high concentrations of 222Rnin the groundwater. An interpretation technique using a Geographic Information System (GIS) software with available informationalso indicated a clear correlation between the rock types and 222Rn concentrations in the groundwater.Several cancer rates near the study area reported to be higher than national average. Many factors can be affecting 222Rn inthe groundwater, what may these factors be in the study area and if the 222Rn concentration is a contributing factor to certainhigh cancer rates in the area remain to be subjects of interest.