The most imperative objectives of the present investigation are to study the quality of ground water of coastal belt of Sindh province. Water samples were collected from coastal belt of Sindh along different points and analyzed for various physicochemical parameters during pre monsoon and post monsoon seasons. The study was conducted between Badin city to Karachi city. Water samples from a variety of areas are contaminated due to the presence of many chemical fertilizers, iron, leather and other industries. All these industries discharge their untreated toxic waste water directly into the Arabian Sea.Various physical and chemical parameters like pH, Electrical Conductivity, Total Hardness, Total Dissolve Solid, Turbidity, Ca Hardness, Mg Hardness, Sulphates and Chlorides are determined for different samples and compared with the standard limits suggested by WHO.