Hydrogeochemistry plays a specialized role in modern mineral exploration and environmental assessment. This study investigates and compares the hydrogeochemical characteristics of water resources associated with three major deposits in Kerman Province, Iran: the Sarcheshmeh copper deposit, the Golgohar iron ore deposit, and the Pabdana coal deposit, to evaluate their impact on water quality. The dominant water facies are chloride-sodic at Golgohar, bicarbonate-calcic at Sarcheshmeh, and a mix of bicarbonate-sodic and bicarbonate-calcic at Pabdana. Water chemistry evolution is primarily controlled by halite and dolomite dissolution in Golgohar; halite and clay mineral dissolution in Sarcheshmeh; and halite dissolution, sodium carbonate presence, and dissolution of dolomite/magnesian calcite from Cretaceous sediments in Pabdana. Cluster analysis reveals distinct water origins: Golgohar waters derive from alluvial-meteoric, mixed meteoric–Kheirabad salt playa, formation–deep brine, and salt playa–deep brine sources; Sarcheshmeh waters from mixed (formation–deep brine and meteoric–formation), meteoric, and formation sources; and Pabdana waters from meteoric, formation, mixed (formation-alluvial and meteoric-formation) sources, with additional evaporation effects. The findings underscore how specific geology and mineralogy of each deposit distinctly shape local hydrogeochemical signatures.