Aquaculture requires good water quality to ensure optimal health and welfare of aquatic animals and the profitability of an aquatic farm. Therefore, the fight against water pollution by EU Member States, in line with the “zero pollution” ambition defined in the European Green Deal, is of particular importance to aquaculture.
Aquaculture producers need authorisation before using seawater or fresh water for the farm. When they return it to the environment, the status of the water body must not deteriorate. Discharges from EU aquaculture facilities must meet the rigorous EU water quality standards as well as stringent national, regional, and local regulations.
Certain forms of aquaculture such as mollusc farming and the farming of algae and other invertebrates, when appropriately managed, can improve the water quality due to the absorption of excess nutrients and organic matter from the environment.