Nanotechnology plays a pivotal role in enhancing water purification techniques. Nanomaterials such as carbon nanotubes, graphene, and silver nanoparticles exhibit unique properties that make them highly effective in removing contaminants. These materials provide a large surface area for adsorption, high reactivity, and the ability to filter particles at the nanoscale, ensuring the removal of bacteria, viruses, heavy metals, and organic pollutants.