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Groundwater samples (n=152) were collected in the Thar Desert of the Umarkot Sub-District, Pakistan to evaluate the geochemical controls on the occurrence of high fluoride (F−) levels within the study area. Fluoride concentrations range from 0.06 to 44.4mg/L, with mean and median values of 5.22 and 4.09mg/L, respectively; and roughly 84% of the samples contain fluoride concentrations that exceed the...
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