Water Quality in the Northern Atlantic Coastal Plain Surficial Aquifer System, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009
註釋 Major Findings: 1) The quality of most groundwater produced for public and domestic water supply is suitable for drinking, although contaminants at concentrations greater than human-health benchmarks have been detected in some places 2) Nitrate is one of the most widespread contaminants in groundwater 3) Radium occurs commonly in groundwater as a result of the degradation of uranium and thorium minerals naturally present in aquifer sediments 4) Chemicals in groundwater move slowly and can be detected in the environment for several decades after they enter the surficial aquifer system. 