Wisley STW - Wastewater Treatment Plant Serving Guildford, Surrey, England

Wisley STW is a wastewater treatment plant located in Wisley, near Guildford, Surrey, England. It serves a population of approximately 24,800 people as part of the region's municipal wastewater infrastructure. The plant is situated in a rural area within the Thames River basin. As a plant serving a medium-sized agglomeration, Wisley STW is expected to meet secondary treatment standards under the UK's transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). The directive requires secondary treatment for discharges to freshwater and estuaries from agglomerations of this scale. The plant's treatment process and capacity details are not publicly available, but it operates within the regulatory framework set by the Environment Agency. The treated effluent from Wisley STW is discharged into the River Wey, a tributary of the River Thames. The Thames eventually flows into the North Sea via the Thames Estuary. The plant plays a key role in protecting the water quality of the River Wey, which supports diverse aquatic life and is used for recreation.

Wisley STW discharges into the River Wey, which flows into the River Thames and ultimately the North Sea. The River Wey is a chalk stream supporting diverse aquatic life, including fish species such as brown trout and grayling. The plant's operations help maintain water quality in this ecologically sensitive river system, which is also used for angling and boating.