water is the most vital element for sustaining life on the earth. There is almost no water left on earth that is safe to drink without purification after 20-25 years from today. This might be a bold statement, but it is unfortunately true. In developing countries, unavailability of safe and unreliable drinking water is a major problem. The world’s demand for potable water is increasing at a constant rate with the growth of population and industries. The solar water distillation comes out to be a non toxic, environment friendly and promising device which purifies water that uses a renewable solar energy source. The TS, TDS, TSS, phosphates and chlorides are reduced to zero after the solar distillation. It insures that the distilled water is ‘Pure’ water. Water desalination using solar energy is suitable for potable water production from brackish and seawater. Various attempts have been made by the researchers to purify the saline water using solar stills using solar energy .But the conversion rate of saline water into pure water is very less and the efficiency of the stills were also not up to the mark. The present paper is an attempt to show the effect of various parameters how they affect the performance and efficiency of the solar still.