Groundwater Quality Data from the National Water Quality Assessment Project, May 2012 through December 2013: data tables and metadata files

Groundwater-quality data were collected from 748 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality...作为美国地质调查局（U.S. Geological Survey）国家水质评估项目（National Water-Quality Assessment Project）的组成部分，研究人员从748口监测井中采集了地下水水质数据……