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Factors affecting water quality in selected carbonate aquifers in the United States,1993-2005
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Hydrogeology and simulation of source areas of water to production wells in a colluvium-mantled carbonate-bedrock aquifer near Shippensburg, Cumberland and Franklin counties, Pennsyvania
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Methods for evaluating temporal groundwater quality data and results of decadal-scale changes in chloride, dissolved solids, and nitrate concentrations in groundwater in the United States, 1988-2010
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Nitrate in ground water and stream base flow in the Lower Susquehanna River Basin, Pennsylvania and Maryland
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Quality of major ion and total dissolved solids data from groundwater sampled by the National Water-Quality Assessment Program, 1992-2010
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Radon in ground water of the Lower Susquehanna and Potomac River Basins
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Relation between selected well-construction characteristics and occurrence of bacteria in private household-supply wells, south-central and southeastern Pennsylvania
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Residence times and nitrate transport in ground water discharging to streams in the Chesapeake Bay Watershed
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Tritium as an indicator of modern, mixed, and premodern groundwater age
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Water quality in the lower Susquehanna River Basin, Pennsylvania and Maryland, 1992-95
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Water quality in the principal aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009
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