WAKEFIELD STANLEY SMALLEY BIGHT STW - Wastewater Treatment Plant in Wakefield, West Yorkshire

WAKEFIELD STANLEY SMALLEY BIGHT STW is a wastewater treatment plant located in Stanley Ferry, Wakefield, West Yorkshire, England. It serves an estimated population of 18,790, placing it in the medium agglomeration category under UK regulations. As a UK facility, the plant operates under the Urban Waste Water Treatment (England and Wales) Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive. For agglomerations of this size, secondary treatment is typically required, with tertiary treatment where the receiving waters are sensitive. The treated effluent is discharged into the River Calder, which flows eastward to join the River Aire near Castleford, eventually reaching the Humber Estuary and the North Sea. The plant plays a key role in protecting water quality in the Calder catchment, which supports diverse aquatic life and recreational uses.

The plant discharges into the River Calder, a tributary of the River Aire, which flows into the Humber Estuary and ultimately the North Sea. The Calder catchment is ecologically important, supporting fish populations including salmon and trout, and is designated for its conservation value. The plant's treatment performance is critical to maintaining water quality standards in this sensitive river system.