Potsdam Milnerton Wastewater Treatment Plant, City of Cape Town, Western Cape

Potsdam Milnerton is a wastewater treatment plant located in the City of Cape Town, Western Cape, South Africa. It serves a population of approximately 347,785 people, classifying it as a large agglomeration under South African water management standards. The plant is situated near the coast, influencing its discharge considerations. As a large-scale facility, Potsdam Milnerton is expected to meet stringent treatment standards under South Africa's National Water Act and Water Services Act. Plants of this size typically employ secondary or tertiary treatment to comply with effluent quality requirements. The designed capacity is reported as 1.00, though the unit is unspecified, indicating a substantial infrastructure. The plant's treated effluent likely discharges into the Atlantic Ocean via local watercourses, given its coastal proximity. The Western Cape region features sensitive marine ecosystems, including the Benguela Current Large Marine Ecosystem, which supports diverse marine life. Proper treatment is critical to protect coastal water quality and downstream environments.

The plant is located in the Western Cape, within the Cape Flats region, and its treated effluent ultimately drains into Table Bay, part of the Atlantic Ocean. The receiving marine environment supports a rich biodiversity, including important fish stocks and seabird colonies. The Benguela Current upwelling system drives high productivity, making nutrient management from wastewater discharges crucial to prevent eutrophication and maintain ecological balance.