Southam District STW - Stratford-on-Avon Wastewater Treatment Plant, Warwickshire

Southam District STW is a wastewater treatment plant located near Bascote Heath in Warwickshire, England, serving the Southam CP area within the Stratford-on-Avon district. The plant handles wastewater from a population of around 15,477, placing it in the medium agglomeration category under UK regulations. Under the UK's implementation of the EU Urban Waste Water Treatment Directive (now retained as domestic law), plants serving populations between 10,000 and 100,000 are required to provide secondary treatment as a minimum. The plant operates within this regulatory framework, ensuring compliance with national standards for effluent quality. The treated effluent is discharged into local watercourses that ultimately drain into the River Leam, a tributary of the River Avon, which flows into the River Severn and then the Bristol Channel. The plant plays a key role in protecting the River Leam and downstream ecosystems from nutrient pollution and organic loading, supporting aquatic life and water quality in the wider Severn basin.

The plant discharges into the River Leam catchment, which flows into the River Avon and then the River Severn, eventually reaching the Bristol Channel. This watershed supports diverse freshwater habitats, including fish populations such as barbel and chub, and is important for migratory species. The plant's treatment helps maintain water quality in this ecologically sensitive river system.