This research discusses the quality of hydrochemical facies of groundwater for selected wells in Thi Qar governorate south Iraq. Physical properties (pH, TDS, EC, TH) were conducted for all samples . The results indicated that this groundwater is neutral and light alkaline, slightly-brackish, excessively mineralized and hard to very hard water. Analyses of cations and anions are carried out to determine two hydrochemical facies, they are " earth alkaline water with increased portions of alkalis with prevailing sulfate and chloride" and " Alkaline water with prevailing sulfate and chloride" belong to (Ca²⁺ - Mg²⁺ - Cl^- - SO4 ^2- ) and (Na⁺- K⁺ - Cl^- - SO4 ^2-). Concerning   evaluation of groundwater suitability for different  purposes, It turned out that this groundwater is unsuitable for human drinking and industrial purposes, satisfactory for livestock . And what about suitability for irrigation purposes, It ranged between unsuitable to doubtful according to ( Na%) and RSC , but it was excellent to good limits according to SAR.