Membrane technology is essential in the sustainability of water usage around the globe, as issues of water scarcity are being realized. Recycled wastewater means less wastage of water and an easier burden on the freshwater supply, provided the wastewater can be reused by making it safe through advanced filtration, which membranes make possible. Both the municipalities and industries are taking an increasing interest in membrane-based systems of wastewater reclamation and desalination. The systems are a sure source of irrigation, industrial, or even potable clean water.