The discharge from desalination plants is almost entirely water, and .01 percent is salt. Desalination is a process that extracts minerals from saline water. More generally, desalination refers to the removal of salts and minerals from a target substance, as in soil desalination, which is an issue for agriculture. Saltwater is desalinated to produce water suitable for human consumption or irrigation. Due to its energy consumption, desalinating sea water is generally more costly than fresh water from rivers or groundwater,water recycling and water conservation.However, these alternatives are not always available and depletion of reserves is a critical problem worldwide. This experiment resulted that 7 lh-1 intake discharge gained the highest position in attaining the clean water during summer season. So it is resulted from this study that this solar unit desalinized water produced maximum clean water if we adjusted the brackish water @7 lh-1 intake discharge of untreated water. During winter season due to low temperature, the efficiency of desalinization rate was reduced to 8.8 - 10.4 liters. From this observation, it was cleared that areas having maximum sunshine hours produced the more clean water for drinking purposes.