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Geochemical evolution processes and water-quality observations based on results of the National Water-Quality Assessment Program in the San Antonio segment of the Edwards Aquifer, Texas, 1996-2006
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Groundwater quality in the Columbia Plateau basaltic-rock aquifers, northwestern United States
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Groundwater quality in the High Plains Aquifer
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Groundwater quality in the Rio Grande aquifer system, southwestern United states
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Hydrogeology, chemical characteristics, and water sources and pathways in the zone of contribution of a public-supply well in San Antonio, Texas
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Nitrate concentrations and potential sources in the Barton Springs segment of the Edwards Aquifer and its contributing zone, central Texas
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Origin and characteristics of discharge at San Marcos Springs based on hydrologic and geochemical data (2008-10), Bexar, Comal, and Hays Counties, Texas
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Origin and characteristics of discharge at San Marcos Springs, south-central Texas
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