Olwazini Wastewater Treatment Works Nedbank, Mogale City, Gauteng | Secondary Treatment Plant

Olwazini Wastewater Treatment Works Nedbank is a municipal wastewater facility located in Mogale City Local Municipality, Gauteng Province, South Africa. The plant serves a small population of 444 people, reflecting its role in a rural or peri-urban community within the West Rand District Municipality. The plant operates with secondary treatment, which is the standard level required under South Africa's National Water Act (Act 36 of 1998) and the Wastewater Treatment Works Regulations. For small agglomerations like this, secondary treatment ensures removal of organic matter and suspended solids, meeting general effluent quality standards before discharge. The treated effluent is discharged into the local water system, which ultimately drains into the Crocodile River catchment, part of the Limpopo River Basin. This watershed supports agricultural activities and provides water for downstream communities and ecosystems. The plant's operation helps protect local water quality in a region where water resources are increasingly stressed.

The treated effluent from Olwazini Wastewater Treatment Works enters the local drainage network, which flows into the Crocodile River, a tributary of the Limpopo River. The Limpopo River Basin is ecologically important, supporting diverse aquatic life and providing water for irrigation and domestic use. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream water bodies.