STOCKLEY STW - Bolsover, Derbyshire Wastewater Treatment Plant

STOCKLEY STW is a wastewater treatment plant located near Bolsover in Derbyshire, England, within the East Midlands region. The facility serves a population equivalent of around 2,566 people, classifying it as a small agglomeration under UK and EU regulatory frameworks. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland freshwater discharges from agglomerations of this size. The designed capacity of 2,566 population equivalent aligns with the served population, indicating adequate infrastructure for current loads. Treated effluent from STOCKLEY STW is discharged into local watercourses that ultimately drain into the River Rother and then the River Trent, a major tributary of the Humber Estuary. The plant plays a role in protecting the water quality of these rivers and the downstream Humber ecosystem, which supports diverse aquatic life and migratory fish species.

The plant discharges into the River Rother catchment, which flows into the River Trent and eventually the Humber Estuary. The Humber is a large estuary supporting important bird populations and fish species. The secondary treatment provided helps reduce organic pollution and protect the ecological health of these downstream waters.