Science, Space and Technology News 2023
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USGS Decadal Change in Groundwater Quality program map showing how concentrations of pesticides, nutrients, metals, and organic contaminants in groundwater are changing during decadal periods across the United States. Credit: U.S. Geological SurveyThe researchers sampled wells within three different network types: domestic areas, urban areas, and agricultural areas.
One of these spots is the Northeastern and Upper Midwest regions, “particularly around urban areas where there’s cold weather and a lot of road salt,” says Lindsey. “We obtained data on road salt application and found correlations between these increases in chloride and sodium and dissolved solids with the road salt application rates.”But another region also had elevated levels of Cl, Na, and dissolved solids: the arid regions of the country, especially in the southwest.
Dissolved salt ions can also pose problems for infrastructure. As the salinity of groundwater increases, corrosivity can become an issue. Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes and other components present in household plumbing.related to rising salinity with implications for human health.
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