Ultra-violet rays are highly disinfectants and kill the disease bacteria, in this disinfection method water is allowed to pass in thickness not exceeding ______ before the ultraviolet rays.

- UV Disinfection Ultraviolet (UV) disinfection is a method used to inactivate pathogenic microorganisms in water by exposing them to UV light. - Water Thickness The effectiveness of UV disinfection is dependent on the depth of water the UV rays need to penetrate. A thinner layer allows for maximum UV exposure. - Standard Thickness The commonly accepted maximum thickness of water for effective UV disinfection is 8 cm (approximately 3 inches).