Addo Wastewater Treatment Plant, Sundays River Valley Local Municipality, Eastern Cape

Addo wastewater treatment plant is located in the Sundays River Valley Local Municipality, within the Sarah Baartman District Municipality of the Eastern Cape province, South Africa. The facility serves a population of approximately 5,698 residents, providing essential sanitation services to this semi-arid region. The plant operates with secondary treatment, which is the standard level required under South Africa's National Water Act and Wastewater Treatment Works regulations for communities of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, producing effluent suitable for discharge into the environment. The treated wastewater is discharged into the local catchment, which ultimately drains into the Sundays River and then into the Indian Ocean via Algoa Bay. The plant plays a crucial role in protecting downstream water quality, particularly in a region where water resources are scarce and ecologically sensitive.

The plant discharges into the Sundays River catchment, which flows into Algoa Bay on the Indian Ocean. This coastal watershed supports diverse aquatic life, including estuarine habitats important for fish breeding and migratory birds. The region's semi-arid climate makes water quality management critical for both ecological health and agricultural water reuse downstream.