Nitrogen discharges to the New York Harbor have been identified as a significant cause of hypoxia in the Long Island Sound and portions of Jamaica Bay. The Long Island Sound Conservation and Management Plan established a 58.5% reduction requirement for all nitrogen discharges entering New York and Connecticut receiving waters within a 15-year period. A plan was required to coordinate these efforts and ensure compliance with NYSDEC.

Savin Engineers assisted in the development of NYC’s nitrogen management plan. Treatment and non-treatment based alternatives were identified. Projected performance and Water Pollution Control Plan scenarios were evaluated for all 14 NYC WPCPs using BioWin (computer simulation model). Sludge settling characteristics were applied to the WPCPs to identify clarifier limitations on the BNR process. Nutrient reduction