Wednesday , 28 September 2016

CHEMICALS FOUND IN TREATED WASTEWATER ARE TRANSPORTED FROM STREAMS TO GROUNDWATER

Scientists studying a midwestern stream conclude that pharmaceuticals and other contaminants in treated wastewater effluent discharged to the stream are transported into adjacent shallow groundwater. Other mobile chemicals found in wastewater are expected to have similar fates.  The scientists determined that conditions suitable for significant infiltration of effluent into shallow groundwater can be created during persistent dry conditions, and during times of the day when effluent discharges are greatest. A network of water-level measurement devices (piezometers) provided data showing stream water is driven into shallow groundwater as a result of higher stream levels caused by the addition of treated wastewater to the stream. http://toxics.usgs.gov/highlights/2014-09-22-pharms2gw.html

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