Materials and Methods Study area The Bibi lake, a natural lake of Vatva taluka, Ahmedabad, Gujarat, India, entirely surrounded by slum area and masses from the surrounding area channelize their domestic waste straight into the lake water. The water samples were collected from five different points of the lake (Figure 1 ). The points can be classified into three types, Abstract Water as a universal solvent has the capability to dissolve many substances including organic and inorganic compounds.

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... he quality of water generally refers to the component of water present at the optimum level for suitable growth of plants and animals. Temperature, turbidity, nutrients, hardness, alkalinity, dissolved oxygen, etc. are some of the important factors that determines the growth of living organisms in the water body. The Bibi lake, a natural lake of Vatva taluka, Gujarat, India is completely surrounded by slum area whom discharge their domestic waste directly into the lake water creating environmental hazard. To understand the situation, water samples were collected monthly to analyze different physical and chemical parameters such as temperature, pH, electric conductivity, turbidity, alkalinity, dissolved oxygen, etc. The comparison of statistics with the standard values of W.H.O guidelines (1998) revealed the high level of turbidity, total dissolved solids, pH, hardness, alkalinity and phosphate in the water content. The accumulation of these pollutants poses a dangerous threat to both aquatic and human lives.