This manual provides the following guidance for the design and validation of UV disinfection systems:
• Provide PWSs and designers with technical information and guidance on selecting,
designing, and operating UV installations and complying with the UV disinfection-related
requirements in the LT2ESWTR.
• Provide states with guidance and the necessary tools to assess UV installations during
the design, start-up, and routine operation phases.
• Provide manufacturers with testing and performance standards for UV reactors and
components intended for treating drinking water.