Discharging untreated wastewater flows can harm Flora and Fauna. On platforms both grey and black water are discharged with a largely variable load. Strict guidelines have been set up for discharging wastewater into the sea, which have been summarized in the MARPOL guidelines.

Engeldot-Water designs and manufactures her wastewater treatment machines according to these international MARPOL guidelines and has been granted a MARPOL type approval by Lloyd's Register.