The various methods to prevent water pollution are listed below:Dispose of toxic chemicals adequately.Do not pour grease and fat into the drain.Use phosphate-free dish cleaner and detergent.Medical waste should be disposed of properly.Plant more trees.Throw litter into the garbage bin only.Wash cars in areas where the water can drain into the grassy area.Try reusing items whenever possible.Use less plastic.Avoid using products that contain persistent and dangerous chemicals.Try installing a rainwater harvesting pit in your garden.