WOKING STW - Woking, Surrey Wastewater Treatment Plant

WOKING STW is a municipal wastewater treatment plant located in Old Woking, Surrey, England, serving a population of around 73,400. The facility is situated in the Thames Basin and plays a key role in managing wastewater from the Woking urban area. Under the UK's implementation of the EU Urban Waste Water Treatment Directive (UWWTD), plants serving agglomerations between 10,000 and 150,000 population equivalent are required to provide secondary treatment as a minimum. For sensitive areas, more stringent treatment may be mandated. The plant's discharge is regulated by the Environment Agency under the Environmental Permitting Regulations. The treated effluent from WOKING STW is discharged into the local watercourse, which flows into the River Wey, a tributary of the River Thames. The Thames eventually drains into the North Sea via the Thames Estuary. The River Wey supports diverse aquatic life and is an important recreational and ecological corridor in Surrey.

The plant discharges into the River Wey catchment, which flows into the River Thames and ultimately the North Sea. The River Wey is a chalk stream supporting diverse aquatic species, including brown trout and water voles. The Thames Estuary is a major ecological area for migratory birds and fish, making nutrient management and treatment quality critical for downstream water quality.