World’s Largest UV Water Treatment Plant – New York

By: Thomas Graham, Research Engineer

New York City- “the City that Never Sleeps”, “the Big Apple”, the Statue of Liberty, Broadway, Wall Street and Times Square- all things that come to mind when one think of this grand Metropolious and most populated city in the United States. Home to 8 million people, New York City certainly has a lot of mouths to feed and thirsty locals and tourists that require water to wash down their NY Strip steaks and slices of NYC’s famous pizza pies!

So how does NYC supply such a large population with refreshing, clean and delicious water?  Simple, construct and operate the largest potable water Ultraviolent (UV) water treatment plant in the world!

In response to the U.S Environmental Protection Agency (EPA) rule requiring treatment for surface water supplies, the Bloomberg Administration and NYC municipally have invested over $10 billion in water supply and distribution infrastructure.

October 8th, 2013 marked the opening of a new 270,000 square-foot UV water treatment plant, which can treat over 2 billion gallons of water a day (BGD, which is more than three times the capacity of the world’s second largest municipal UV water treatment plant, currently under construction in Los Angeles, California.

World’s Largest UV Water Treatment Plant - New York

World’s Largest UV Water Treatment Plant – New York

Drawing most of its water from the pristine Catskill/Delaware and Croton watersheds, the plant operations’ consists of water screening, UV treatment, and chlorination.  The UV treatment basis of design was centered on low pressure, high output UV water treatment lamps that utilize approximately one-third of the power of middle pressure lampbased system, minimizing electrical demand while maximizing disinfection efficiency.

Project construction and design includes:

  • 56 of the largest UV water treatment units ever manufactured.
  • Danaher TrojanUV technology
  • Each UV water treatment unit contain 210 lamps  (11,760 UV bulbs) and delivers a 40 mJ/cm2 dose to 40 million gallons of water per day (MGD)- protecting the water supply from microorganisms such as Cryptosporidium and Giardia
  • Installation of more than a mile of cement-lined 12 foot diameter pipe
  • 10,000 linear feet of steel pipe
  • 1,200 tons of structural steel
  • 20,000 square feet of aluminum grating
  • 121,000 cubic yards of concrete

Additionally the water treatment project funds projects that suppor “sustainable farming practices, environmentally sensitive economic development, and local economic opportunity.”

The next time you visit NYC be sure to consider the environment and SAY NO to expensive plastic water bottles and enjoy a tall glass of pristine tap water.





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