AWWA ACE62988

New York City is moving ahead with the construction of a 2 billion-gallon-per-day ultraviolet light (UV) disinfection facility to treat unfiltered water from its Catskill and Delaware reservoir systems. The UV facility which will be operated by the New York City Department of Environmental Protection (NYCDEP) is designed to provide up to 99.9-percent (3-log) inactivation of Cryptosporidium to meet future regulatory requirements for unfiltered water supplies. A total of 56 of the largest UV units ever built, each sized to handle 40 million gallons per day (mgd), are required for UV disinfection. This paper discusses the importance of several operation and maintenance considerations required for the design of the world's largest drinking water disinfection facility, including topics such as workforce requirements, available man power, level of maintenance skill needed, and operational strategies. Includes 3 references, tables, figures.