Drinking water is a necessity, yet there is only so much of it on Earth. Saline water contains the most substances on Earth yet is unfit for human consumption. The sun's energy, on the other hand, is completely free, which is why scientists are focusing on turning salt water into drinkable water. Though the production of the solar still has increased because to the efforts of many researchers, it is still insufficient for most domestic and commercial water needs. This literature study provides an overview of the work done on HDH desalination systems by researchers. Finally, the potential for the HDH desalination system to increase output in the future is discussed.