ETWALL STW - Secondary Wastewater Treatment Plant in South Derbyshire, England

ETWALL STW is a wastewater treatment plant located in Etwall, South Derbyshire, in the East Midlands of England. It serves a population of approximately 2,772 people, classifying it as a small agglomeration under UK and EU regulatory frameworks. The plant is situated inland, away from coastal areas, and its operations are part of the broader water infrastructure managed by regional water authorities. 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 4,500 m³/day and an average discharge volume of 617.14 m³/day, the facility operates well below its capacity, indicating potential for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that ultimately drain into the River Trent catchment, part of the Humber River Basin. This region supports diverse aquatic life and is important for water quality management in the East Midlands. The plant's performance is regulated under the UK's environmental permitting system, ensuring compliance with discharge standards to protect downstream ecosystems.

ETWALL STW discharges into local streams that feed into the River Dove, a tributary of the River Trent. The Trent flows into the Humber Estuary, which is a major ecological site supporting migratory fish and bird populations. The catchment area includes agricultural and semi-urban landscapes, making nutrient management and pollution control critical for maintaining water quality in the river system.