Ultraviolet Disinfection Guidelines for Water Reuse and Equipment Performance Validation

In 1993, National Water Research Institute (NWRI) collaborated with the California Department of Health Services (DHS) to develop the Ultraviolet Disinfection Guidelines for Wastewater Reclamation in California. The application of UV disinfection for wastewater reclamation has grown significantly since NWRI published these guidelines. In January 2000, NWRI and DHS co-sponsored “UV 2000: A Technical Symposium” to address the technological advancements and regulatory changes that had occurred since the publication of the 1993 UV Guidelines. The focus of UV 2000 was on the need to revise and expand the 1993 UV Guidelines. Because of the substantial interest in North America in applying UV disinfection for production of drinking water, the need to provide guidelines for UV application for drinking water disinfection was also discussed.