When we hear of ozone destruction, it is almost always in a negative context. But did you know that ozone is used for disinfecting water purification systems? UV light must be used for ozone destruction after the disinfection process is complete. To be clear, we’re talking about residual ozone destruction – the process of breaking down the residual ozone into its component parts, typically oxygen, to render it harmless. It’s an essential step in water purification to avoid adverse environmental or human health impacts.