Disinfection By-Products Study for New York City Water System Client: New York City Department of Environmental Protection The US Environmental Protection Agency promulgated signicantly more stringent standards (known as the Stage 2 Disinfection/Disinfectant By-Products Rule) for the levels of Disinfection By-Products (DBPs) in drinking water delivered to consumers. These new standards must be met by 2012 (for large systems). Concerned about meeting the stricter standards, the New York City (NYC) Department of Environmental Protection, which operates NYC’s water system, retained Hazen and Sawyer (in Joint Venture) to undertake a $1.8 million study to help the City determine the best course of action for complying with the new regulations. Project Outcomes and Benefits Concluded that switc

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