ARLEY STW Wastewater Treatment Plant, North Warwickshire, England

ARLEY STW is a wastewater treatment plant located in North Warwickshire, England, serving the local community of Arley. The plant provides secondary treatment for a population equivalent of 3,606, with a designed capacity of 7,000 m³/day and an average daily discharge of 802.82 m³/day. As a secondary treatment facility, ARLEY STW meets the standard requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The plant is operated as part of the United Kingdom's wastewater infrastructure, regulated by the Environment Agency under the Water Industry Act 1991. The treated effluent from ARLEY STW is discharged into local watercourses that ultimately drain into the River Tame and then the River Trent, contributing to the Humber Estuary and the North Sea. The plant plays a key role in protecting the water quality of these downstream environments.

ARLEY STW discharges into the River Tame catchment, which flows into the River Trent and eventually the Humber Estuary and North Sea. The local watershed supports diverse aquatic life and is important for migratory fish species. The plant's secondary treatment helps reduce organic pollutants and protect downstream ecosystems.