Dunchurch STW - Secondary Wastewater Treatment Plant in Rugby, England

Dunchurch STW (Sewage Treatment Works) is located near Thurlaston in Warwickshire, England, serving the village of Dunchurch and surrounding areas within the Rugby borough. The plant treats wastewater from a population equivalent of approximately 2,754, classifying it as a small agglomeration under UK and EU frameworks. The facility 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 plant has a designed capacity of 3,250 cubic meters per day and currently discharges an average volume of 613 cubic meters per day, indicating significant spare capacity. Treated effluent from Dunchurch STW is discharged to local streams that feed into the River Avon (Warwickshire), a tributary of the River Severn. This catchment supports diverse aquatic life and is important for regional biodiversity, with the Severn Estuary eventually receiving the waters. The plant plays a key role in protecting local water quality in the Avon catchment.

The plant discharges into small watercourses that drain into the River Avon, which flows through Warwickshire before joining the River Severn. The Severn Estuary is a major ecological feature supporting migratory fish and bird populations. The Avon catchment is designated as a sensitive area under UK regulations, requiring nutrient removal to prevent eutrophication. Dunchurch STW's secondary treatment helps maintain water quality in this ecologically important river system.