Desalination and reverse osmosis are processes used to transform raw water into potable water, or drinking water. Desalination is the process of transforming salinated water into usable cooking and drinking water by eliminating dissolved salt particles from source water. Desalination can be achieved through reverse osmosis systems found in modern water treatment plants. The reverse osmosis process utilizes pressurized tanks to force saltwater through a semi-impermeable layer. The semi-impermeable layer blocks salt particles but allows pure water molecules to pass through creating desalinated, potable water.