SPERNAL STW - Stratford-on-Avon Wastewater Treatment Plant, Warwickshire

SPERNAL STW is a wastewater treatment plant located in Spernal Lane, Sambourne, near Stratford-on-Avon in Warwickshire, England. It serves a population of approximately 85,000, classifying it as a large agglomeration under UK regulatory frameworks. The plant is situated inland, over 50 km from the coast, and discharges into local watercourses that ultimately drain to the River Avon. As a plant serving over 50,000 people, SPERNAL STW is subject to the requirements of the Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum and tertiary treatment where the receiving waters are sensitive. The UK's Environment Agency oversees compliance through permits under the Environmental Permitting Regulations. Plants of this scale typically employ advanced biological treatment to meet stringent effluent quality standards. The treated effluent from SPERNAL STW is discharged into the River Arrow, a tributary of the River Avon, which flows into the Severn Estuary. This catchment supports diverse aquatic life and is important for migratory fish species. The plant plays a key role in protecting water quality in the Avon catchment, which is used for recreation and supports local ecosystems.

SPERNAL STW discharges into the River Arrow, which joins the River Avon near Evesham. The Avon flows into the Severn Estuary, a major ecological feature supporting diverse bird populations and fish species. The catchment is designated as a Site of Special Scientific Interest (SSSI) in parts, and the plant's operations help maintain water quality standards for this sensitive river system.