This paper reports the geochemistry of the thermal and cold waters at Benetutti in central Sardinia. Both major and trace components in 24 water samples were analysed using various techniques. The thermal waters show a sodium chloride composition and a salinity of 0.5 g/L; they are characterised by a pH of 9.5-9.7, very low magnesium (0.01-0.1 mg/L), and much higher F, B, Li, Rb, Cs, and Mo concentrations than in the cold waters of the area. No variations in temperature, flow, or chemical composition were observed at the thermal springs for which records dating back 20 years are available. Subsurface reservoirs associated with the thermal springs are of a low enthalpy (calculated temperature at depth is about 60°C), and are therefore candidates for direct uses, such as balneology, space heating, and horticulture
