Delmas Wastewater Treatment Plant, City of Ekurhuleni, Gauteng

Delmas wastewater treatment plant is located in the City of Ekurhuleni Metropolitan Municipality, Gauteng, South Africa. The facility serves a population of about 27,012, placing it in the medium agglomeration category for the region. As a South African plant, it operates under the National Water Act (Act 36 of 1998) and the Water Services Act (Act 108 of 1997), which set standards for wastewater treatment and discharge. For a plant of this scale, secondary treatment is typically required to protect receiving water bodies and public health. The plant's treated effluent likely discharges into local watercourses that drain into the Vaal River system, part of the Orange River basin. This watershed supports agriculture, industry, and ecosystems in the region, making effective treatment essential for downstream water quality and biodiversity.

The plant is situated inland in Gauteng, within the Vaal River catchment. Treated wastewater likely flows into local streams that feed the Vaal River, a major tributary of the Orange River. The Orange River ultimately discharges into the Atlantic Ocean. The Vaal River system supports diverse aquatic life and provides water for irrigation and drinking, so maintaining effluent quality is critical to prevent eutrophication and protect downstream ecosystems.