Technological innovations are making it possible to treat water effectively, thereby improving public health. Technologies using advanced oxidation processes, adsorption, and biological agents are increasingly efficient in absorbing contaminants from wastewater. Filter membranes that remove microcontaminants are being developed using nanotechnology. Cutting-edge methods of desalinating seawater using renewable energy are also being deployed. Together with water management systems, these technologies reduce wastage and help meet water demand.