Limit, cease or prohibit the discharge of waste effluents overboard from vessels
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Commercial, recreational, industrial, and military vessels can generate large amounts of liquid waste, such as sewage, grey waters, and bilge waters (Welles 2003). Discharge of these wastes overboard from vessels can impact subtidal benthic invertebrates through the introduction of bacteria, excess nutrients, toxic substances and solid particles. Limiting, ceasing or prohibiting the discharge of waste overboard from vessels in an area can potentially reduce or stop the source of pollution and allow subtidal benthic invertebrates to recover over time. In many parts of the world, it is illegal to dispose of waste effluents into coastal waters or delimited zones, for instance following local bylaws.
Evidence for interventions related to the discharge of solid wastes overboard are summarised under “Threat: Pollution – Limit, cease or prohibit the discharge of solid waste overboard from vessels”.
Welles L.K. (2003) Comment: Due to loopholes in the Clean Water Act, what can a state do to combat cruise ship discharge of sewage and gray water. Ocean & Coastal Law Journal, 9, 99.