Two a Day WWTW - Secondary Treatment Plant in Theewaterskloof, Western Cape

Two a Day WWTW is a municipal wastewater treatment plant located in Grabouw, within the Theewaterskloof Local Municipality of the Western Cape, South Africa. The plant serves a small population of 392 people, reflecting its role in a rural or peri-urban setting. It is situated inland, more than 10 km from the coast but within 50 km of the coastline. The plant provides secondary treatment, which is the standard biological treatment process required for municipal wastewater in South Africa. Under the South African National Water Act and the Wastewater Treatment Works regulations, secondary treatment ensures the removal of organic matter and suspended solids, producing effluent suitable for discharge into surface waters. The plant's discharge volume is reported as 53.00 units, indicating a modest flow consistent with the small population served. The treated effluent from Two a Day WWTW is discharged into the local river system, which ultimately drains into the Bot River Lagoon and then into the Atlantic Ocean near Hermanus. The receiving water body supports diverse aquatic life and is part of a sensitive coastal wetland ecosystem. The plant's operation helps protect downstream water quality and the ecological health of the Bot River system.

Two a Day WWTW discharges into the Bot River system, which flows into the Bot River Lagoon, a coastal lagoon that supports diverse bird and fish species. The lagoon is an important migratory corridor and nursery habitat. The plant's secondary treatment helps reduce nutrient and organic loads, protecting the lagoon's ecological balance and downstream marine environment.