OVERSEAL STW - Secondary Wastewater Treatment in South Derbyshire, England

OVERSEAL STW is a wastewater treatment facility located on Lullington Road in Overseal, South Derbyshire, within the East Midlands region of England. The plant serves a population of approximately 2,403 people, classifying it as a small agglomeration under UK and EU regulatory frameworks. As part of the United Kingdom's wastewater infrastructure, it plays a key role in managing domestic sewage from the local community. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland freshwater discharges. With a designed capacity of 2,600 cubic meters per day and an average discharge volume of 535 cubic meters per day, the facility operates well within its capacity. The treatment process typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into local watercourses that drain into the River Trent catchment, ultimately reaching the North Sea via the Humber Estuary. The plant's operation helps protect the ecological health of these water bodies by reducing nutrient and pollutant loads. Its inland location and secondary treatment level align with regulatory requirements for small communities in sensitive areas.

OVERSEAL STW discharges into local streams that are part of the River Trent basin, which flows into the Humber Estuary and then the North Sea. The River Trent supports diverse aquatic life, including fish species such as barbel and chub, and the estuary is an important migratory corridor for birds. The plant's secondary treatment helps control nutrient inputs, reducing the risk of eutrophication in downstream waters.