BENTLEY STW Wastewater Treatment Plant, East Hampshire, England

BENTLEY STW is a wastewater treatment plant located in East Hampshire, Hampshire, England, serving a population of approximately 2,530. The facility operates under the regulatory framework of the United Kingdom, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for secondary treatment standards. The plant provides secondary treatment, a standard level for small agglomerations under UK regulations. With a designed capacity of 3,302 m³/day and an actual discharge volume of 563.27 m³/day, the plant operates well within its capacity, ensuring effective treatment of domestic wastewater. The treated effluent is discharged into local watercourses that drain into the River Wey and eventually the River Thames, contributing to the Thames Basin. This supports the ecological health of downstream habitats, including wetlands and estuaries that are vital for biodiversity.

The plant discharges into local streams that feed the River Wey, a tributary of the River Thames. The Thames Basin supports diverse aquatic life and provides important habitats for fish and bird species. The region's chalk streams are ecologically sensitive, requiring careful management of nutrient loads to prevent eutrophication.