How nanotechnology is helping countries to generate clean water Most of the developing countries are investigating how to get the complete access to clean water with the help of nanotechnology, and in the last few years have worked hard in the laboratories with nano particles for cleaning water. China, Saudi Arabia, India, South Africa and Brazil, for example, have dedicated nanotechnology research centers where water cleaning treatment is studied. Water treatment systems in Russia are also doing extensive search in nanotechnology to clean the water from various deadly pollutants. Nanotechnology primarily consists of the processing, consolidation, separation, and deformation of materials by one molecule or one atom”, the methods and tools for nanotechnology consist measuring, imaging, modelling, and manipulating matter at the nano scale. Diagnosis of particles at the nano scale stage contributed comprehensively to the modification, production, and shaping of designs that were utilized in various industrial, environmental and health applications How Nanotechnology help in cleaning water Scientists have met the primary challenge of producing their own nanoparticles. But its efficient and effective use in the water leaning process in large-scale is more difficult, and this facet has not been able to take the advantage of the full potential of nanotechnology. They possess the exclusive nanoparticles properties, making them particularly fit for treating waters, have the potential to enhance processes such as catalysis, adsorption, and disinfection. Generally, have the high catalytic ability: for an instance, when the organic molecules debase dangerous to the environment, nano-titanium dioxide provides better results than traditional micron particles. Similarly, the titanium dioxide’s nanoparticles and silver have better disinfection power in the treating the drinking water. Furthermore, the nanoparticles can be intended to produce particles to determine for particular uses. Nano catalysts, magnets, and detectors Nanotechnology applications for clean water involves magnetic nanoparticles and nanocatalysts to treat highly polluted water making it suitable for irrigation, sanitation, and drinking, Nanocatalysts have their improved catalytic properties to being modified at the nanoscale. They can chemically decompose pollutants rather than simply shift them somewhere else, which includes pollutants for which current technologies are prohibitively expensive or inefficient. As with any other application of nanotechnology where there is an opportunity that engineered nanoparticles could ultimately appear in different environments, the ecological and potential human risk factors coupled with this are basically unidentified and subject to much debate. Several toxicity studies of nanomaterials has pointed out few impact of toxicological nanoparticles on different aquatic organisms. The bottom line expects to be that it might be sensible to come to some specific conclusions about nanoparticle ecotoxicology before embarking a large-scale utilization of nanoparticles in water applications. However, there is an increasing body of R&D that will lead to use of nanotechnologyimparting an important role in future wastewater and water treatment.