Nassau County Sewage District

It is owned by Nassau County and as of 2022 is operated under contract by Suez North America.

[1] In recent years, the Nassau County Sewage District assumed control of the City of Glen Cove's sanitary sewer system.

[2] The Nassau County Sewage District also treats sanitary sewage from other, independent systems (i.e.: the Village of Roslyn's sanitary sewer system, which is treated by Nassau County's facilities via the line known as the East Hills Interceptor, which travels from Roslyn Heights to the main part of the Nassau County network in Westbury by means of Roslyn Road, the North Service Road, and Old Westbury Road).

[2][5][3] There were failed attempts made in the 1970s to extend Nassau County's sewer system into North Shore communities which either partially or completely lacked sewers, including but not limited to: East Hills, Flower Hill, Munsey Park, Plandome, Roslyn Harbor, and Sands Point.

[6] The project failed in large part due to public opposition.