SHREWTON STW - Secondary Wastewater Treatment Plant in Shrewton, Wiltshire

SHREWTON STW is a wastewater treatment plant located in Shrewton, Wiltshire, England, serving a population of approximately 1,746. The facility provides secondary treatment, which is the standard biological treatment stage required for municipal wastewater in the United Kingdom. As a small agglomeration under the EU Urban Waste Water Treatment Directive (now retained in UK law), the plant is expected to meet secondary treatment standards. The designed capacity of 2,617 cubic meters per day indicates the plant is sized to handle current and future flows, with a reported discharge volume of 388.72 cubic meters per day. The treated effluent from SHREWTON STW is discharged into local watercourses that ultimately drain into the River Avon (Hampshire) and then to the English Channel. The plant plays a key role in protecting the chalk stream ecosystems of the Salisbury Plain area, which are sensitive to nutrient pollution.

SHREWTON STW discharges into the River Till, a tributary of the River Avon (Hampshire), which flows south to the English Channel. The River Avon is a classic chalk stream, supporting diverse aquatic life including salmon, trout, and water crowfoot. The plant's secondary treatment helps protect this sensitive ecosystem from organic pollution and eutrophication.