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Impact of Drought on Wastewater Contaminants in an Urban Water Supply

Impact of Drought on Wastewater Contaminants in an Urban Water Supply,10.2134/jeq2009.0072,Journal of Environmental Quality,Mark J. Benotti,Benjamin D

Impact of Drought on Wastewater Contaminants in an Urban Water Supply   (Citations: 1)
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Th e concentrations of selected wastewater contaminants, including conductivity, nitrate, and pharmaceuticals and endocrine disrupting compounds (EDCs), were monitored from 2003 to 2007 in Lake Mead, the raw (untreated) drinking water for southern Nevada. Monitoring was also conducted in two infl ows to Lake Mead: the Colorado River and the wastewater-dominated Las Vegas Wash. Th ere was a statistically signifi cant increase in source water conductivity, nitrate, and pharmaceutical and EDC concentrations over this time period, concomitant with a statistically signifi cant decline in the volume of Lake Mead. Th ere was no statistically signifi cant increase in conductivity and nitrate in the Colorado River or the Las Vegas Wash over this period, nor was there an increase in fl ow of the Las Vegas Wash or Colorado River. Th us, the deterioration of source drinking water quality is due to the decrease in the volume of Lake Mead which has been attributed to drought. Th is phenomenon may also be a harbinger of how water quality may be adversely aff ected by climate change as patterns of surface water fl ow shift and treated wastewater becomes a larger fraction of surface water fl ow in some areas.
Journal: Journal of Environmental Quality - J ENVIRON QUAL , vol. 39, no. 4, 2010
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