Charlbury Charlbury Oxon STW - Secondary Wastewater Treatment in West Oxfordshire, England

Charlbury Charlbury Oxon STW is a wastewater treatment plant located in Charlbury, West Oxfordshire, England. It serves a population of approximately 2,700 people, making it a small agglomeration under UK and EU classifications. The plant is situated near the River Evenlode, a tributary of the River Thames. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. With a designed capacity of 2,750 m³/day and an average daily flow of 601.11 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. Treated effluent from the plant discharges into the River Evenlode, which flows into the River Thames and eventually reaches the North Sea. The plant plays a key role in protecting water quality in the Thames catchment, supporting aquatic life and downstream ecosystems in one of England's most important river basins.

The plant discharges into the River Evenlode, a tributary of the River Thames, which flows through the Cotswolds and into the Thames Estuary and the North Sea. The Evenlode supports diverse aquatic life, including brown trout and coarse fish, and is part of a catchment designated as a Site of Special Scientific Interest (SSSI) for its biodiversity. The plant's secondary treatment helps maintain water quality in this ecologically sensitive river system.