EPA Guidance Manual: Alternative Disinfectants and Oxidants – Ozone

This EPA guidance document provides a comprehensive overview of ozone technology and its role in drinking water treatment. The publication examines the chemistry of ozone, system design considerations, generation methods, contactor technologies, operational requirements, and safety practices for water treatment applications. It also reviews ozone’s effectiveness as a powerful disinfectant and oxidant for controlling bacteria, viruses, protozoa, taste and odor compounds, iron, manganese, sulfides, and various organic contaminants. In addition, the document discusses ozone disinfection byproducts, regulatory considerations, biological filtration, and best practices for integrating ozonation into modern water treatment systems. As a technical reference, it highlights the advantages, limitations, and practical implementation of ozone for producing safe, high-quality drinking water.