Ozone (03) is one of the strongest oxidizing agents that is readily available. It is used to reduce color, eliminate organic waste, reduce odor and reduce total organic carbon in water. Ozone is created in number of different ways, including ultra violet (UV) light, corona discharge of electricity through an oxygen stream (including air) and several others.

In treating small quantities of waste, the UV Ozonators are the most common, while large-scale systems use either corona discharge or there bulk ozone producing methods.