Ground Water Canada

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USGS map reveals long-term changes in U.S. ground water quality


June 3, 2016
By Circle of Blue

Reston, VA – A U.S. Geological Survey assessment of changes in the nation’s ground water quality in the last two decades concludes chloride and nitrate concentrations are rising and arsenic levels are holding steady or falling. The study includes an interactive map. Circle of Blue reports. | READ MORE