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Workgroup Report: Drinking-Water Nitrate and Health—Recent Findings and Research Needs
Human alteration of the nitrogen cycle has resulted in steadily accumulating nitrate in our water resources. The U.S. maximum contaminant level and World Health Organization guidelines for nitrate inExpand
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Probability of nitrate contamination of recently recharged groundwaters in the conterminous United States.
A new logistic regression (LR) model was used to predict the probability of nitrate contamination exceeding 4 mg/L in predominantly shallow, recently recharged groundwaters of the United States. TheExpand
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Nitrate in groundwater of the United States, 1991-2003.
An assessment of nitrate concentrations in groundwater in the United States indicates that concentrations are highest in shallow, oxic groundwater beneath areas with high N inputs. During 1991-2003,Expand
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Risk of nitrate in groundwaters of the United States - A national perspective
Nitrate contamination of groundwater occurs in predictable patterns, based on findings of the U.S. Geological Survey's (USGS) National Water Quality Assessment (NAWQA) Program. The NAWQA Program wasExpand
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Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States.
  • B. Nolan, K. J. Hitt
  • Environmental Science, Medicine
  • Environmental science & technology
  • 27 October 2006
Two nonlinear models were developed at the national scale to (1) predict contamination of shallow ground water (typically < 5 m deep) by nitrate from nonpoint sources and (2) to predict ambientExpand
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Nutrients in groundwaters of the conterminous United States, 1992-1995.
Results of a national water quality assessment indicate that nitrate is detected in 71% of groundwater samples, more than 13 times as often as ammonia, nitrite, organic nitrogen, and orthophosphate,Expand
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Factors influencing ground-water recharge in the eastern United States
Summary Ground-water recharge estimates for selected locations in the eastern half of the United States were obtained by Darcian and chloride-tracer methods and compared using statistical analyses.Expand
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Modeling the probability of arsenic in groundwater in New England as a tool for exposure assessment.
We developed a process-based model to predict the probability of arsenic exceeding 5 microg/L in drinking water wells in New England bedrock aquifers. The model is being used for exposure assessmentExpand
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VOCs, pesticides, nitrate, and their mixtures in groundwater used for drinking water in the United States.
Samples of untreated groundwater from 1255 domestic drinking-water wells and 242 public supply wells were analyzed as part of the National Water-Quality Assessment Program of the U.S. GeologicalExpand
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