PEWSEY STW - Wastewater Treatment Plant in Pewsey, Wiltshire, England

PEWSEY STW is a wastewater treatment plant located in Pewsey, a village in Wiltshire, England. The plant serves a population of around 7,200, classifying it as a small to medium agglomeration under UK and EU regulatory frameworks. It is situated inland, approximately 50 km from the coast, and discharges into the local river system. As a plant serving fewer than 10,000 people, PEWSEY STW is subject to the Urban Waste Water Treatment (England and Wales) Regulations, which transpose the EU Urban Waste Water Treatment Directive. These regulations require secondary treatment for inland discharges from agglomerations of this scale. The regulatory framework ensures appropriate treatment standards are met. The treated effluent from PEWSEY STW is discharged into a local watercourse, likely a tributary of the River Avon, which flows into the English Channel via Christchurch Harbour. The receiving waters support diverse aquatic life and are part of the Hampshire Avon catchment, an ecologically important chalk stream system known for its biodiversity.

PEWSEY STW discharges into the local river network, which is part of the Hampshire Avon catchment. The River Avon is a classic chalk stream, supporting a rich ecosystem including salmon, trout, and diverse macroinvertebrates. The river flows south through Salisbury and into Christchurch Harbour, a coastal estuary that provides important habitat for migratory birds and fish. The plant's discharge must meet strict quality standards to protect this sensitive freshwater environment.