“…Weathering and dissolving of fluoride minerals are the primary controls on its concentration in groundwater, since lithology plays a vital impact in its occurrence [17]. The availability and solubility of fluoride minerals, pH, temperature, anion exchange capacity of aquifer materials, type of geological materials, residence time, porosity, structure, depth, groundwater age, and concentration of carbonates and bicarbonates in water all influence the fluoride contamination of groundwater [18].…”