WYE STW - Secondary Wastewater Treatment Plant in Ashford, Kent, United Kingdom

WYE STW (Sewage Treatment Works) is located in Wye, near Ashford, Kent, England. The plant serves a population of approximately 2,431 and operates as part of the UK's wastewater infrastructure managed by water companies under regulatory oversight by the Environment Agency. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (transposed into UK law). With a designed capacity of 2,453 m³/day and an average discharge volume of 541.23 m³/day, the plant operates well within its capacity, indicating headroom for future growth. The treated effluent is discharged into local watercourses that drain into the River Stour, eventually reaching the North Sea via the English Channel. The plant plays a key role in protecting the water quality of the River Stour and downstream ecosystems, including estuarine habitats important for migratory fish and bird species.

WYE STW discharges into the River Stour catchment, which flows through the Kent countryside before entering the North Sea via Pegwell Bay. The river supports diverse aquatic life, including salmonid fish, and its estuary is an important stopover for migratory birds. The plant's secondary treatment helps reduce nutrient loads and organic pollutants, safeguarding the ecological health of the river and coastal waters.