Tanfield STW - Stanley, County Durham Wastewater Treatment Plant

Tanfield STW is a wastewater treatment plant located near Stanley in County Durham, North East England. It serves a population of approximately 18,000, classifying it as a medium-sized agglomeration under UK regulatory frameworks. The plant is situated inland, away from coastal areas, and its treated effluent is discharged into the local river system. As a UK wastewater facility, Tanfield STW is regulated under the Water Industry Act 1991 and must comply with discharge permits issued by the Environment Agency. For a plant of this scale, secondary treatment is typically required, with potential additional nutrient removal if discharging into sensitive areas. The plant's discharge ultimately flows into the River Wear catchment, which drains into the North Sea. The River Wear supports diverse aquatic life and is an important ecological corridor in the region. Tanfield STW plays a key role in protecting water quality in this river system by treating wastewater before release.

Tanfield STW discharges into the River Wear catchment, which flows eastward through County Durham to the North Sea near Sunderland. The River Wear supports salmon and trout populations and is designated as a Site of Special Scientific Interest (SSSI) in parts. The plant's treatment helps maintain water quality in this ecologically important river system, which also provides drinking water and recreational opportunities downstream.