Outfall
An outfall is the outlet of a of a river, drain or a sewer where it discharges into the sea, a lake or the like.
In the case of a sewerage system, for foul sewage. it discharges foul or treated water effluent to a waterway on land (a land outfall) or to the ocean (an ocean outfall). An ocean outfall may be led several miles offshore, to discharge by nozzles at the end of a spreader or T-shaped structure. Outfalls may be constructed as an outfall tunnel or subsea tunnel and discharge effluent to the ocean via one or more risers with nozzles.
See also Night soil, Greywater