Abstract: In this study, the effect of the iron deposits, located in Menteş watershed on the ground waters wasinvestigated. The study area is located in the Seyhan river main basin. The Menteş watershed coversan area of 43 km2 with an annual average precipitation of 460 mm/year. The study area comprisesPrecambrian metaclastics, Lower Cambrian quartzite, Middle Cambrian recrystallized limestone,Ordovician metaclastics, Miocene conglomerate and recent alluvium. Recrystallized limestones are mainaquifers within the studied area. To determine aquifer parameters totally 15 groundwater samples weretaken from springs and wells in dry and wet seasons, T, pH and EC values were measured in-situ and themajor anion - cation and trace element analysis were done. Temperature of the waters ranged from 7 oCand 19 oC; pH values ranged from 7,26 and 8,7; EC values ranged from 47,3 μS/cm and 642 μS/cm. Thecation and anion sequencing of the water samples are mostly in rCa> rMg > rNa > rK and r HCO3> rSO4> rCl form, respectively and this sequencing indicate that the groundwater are predominantly locatedwithin the limestone and dolomite. δ18O (‰-10,93 - ‰-8,27) and δ2H (‰-64,18 - ‰-54,58) values showthat waters are meteoric origin. The major anion and cation values of the water samples are below thedrinking water limit values (TS 266 and WHO). Trace element analysis covering 66 parameters wereanalyzed by ICP-MS method and more than 30 elements including Hg, Cd, Th and Ag stayed in belowdetection limits. As, B, Co, Cr, Cu, Mo, Ni, Pb, Sb, Ti, U, V, W, Zn, Se and other elements’ values are lowenough to be ignored. The examined inorganic parameters showed that ground waters located in Menteşwatershed iron mine fields and its close vicinity have drinking water quality.