New York City's water distribution system has never had a water filtration plant, until now. Mandated by the Environmental Protection Agency for surface water, the city is constructing the $2.8 billion Croton Water Filtration Plant, planned for operation in 2012. According to the article, "enacted in 1989, the Surface Water Treatment Rule requires all public surface water systems to achieve 99.9% removal of bacteria, Giardia lamblia cysts and viruses and a maximum contaminant level of 1 nephelometric turbidity units" (p. 25). New York received a "filtration avoidance" for water from its western region but required action for the eastern region, the location of the Croton facility. Constant stormwater runoff and pollution necessitated the plant. The new system will supply the city with 10% to 30% of its water, depending on the level of precipitation. The total capacity of water treatment of the 4000,000 square foot plant will equal approximately 290 million gallons of water per day.
Buehrer, J. (2009, June 15). Digging in to deliver clean water. Engineering News Record, 262(19), 24-28.
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