Seawater desalination using reverse osmosis is a process where a special filter separates pure water from salty water under pressure. This method is commonly used for purifying brackish water and is now being applied to seawater desalination. Recent research, supported by the U.S. Department of the Interior, has shown promising results in moving reverse osmosis from research to commercial use. Plants using this technology have been successful in producing high-quality water, with performance records backing up manufacturer warranties.