Hydrochemistry of groundwater in Kalwakurthy area, Nagar kurnool District, Telangana, India was used to assess the quality of groundwater for determining its suitability for agricultural purposes. Physical and chemical parameters of groundwater such as pH, Electrical Conductivity, Total Dissolved Solids (TDS), TH, Na+, K+, Ca2+, Mg2+, Cl-, HCO3-, CO3-, and, SO4- and Chemical index like Percentage of Sodium (%Na), Chloro Alkaline Indices (CAI) and Kelley’s Ratio and Magnesium hazard were calculated based on the analytical results. Concentrations of the chemical constituents in groundwater vary spatially and temporarily. Interpretation of analytical data shows that mixed Ca-Na-Mg-HCO3-Cl is the dominant hydrochemicalfacies in the study area. Alkali earths (Ca2+, Mg2+) and strong acids (Cl-, SO42-)) are slightly dominating over alkalis (Na+, K+) and weak acids (HCO3-, CO32-). High total hardness and TDS in a few places identify the unsuitability of groundwater for drinking and irrigation.
