Redacre STW - Calderdale, West Yorkshire Wastewater Treatment Plant

Redacre STW is a wastewater treatment plant located in Calderdale, West Yorkshire, England, serving the communities of Hebden Royd, Mytholmroyd, and surrounding areas. With a population served of around 8,200, it is classified as a small to medium agglomeration under UK wastewater regulations. The plant operates within the regulatory framework of the UK, which transposes the EU Urban Waste Water Treatment Directive (91/271/EEC). It is part of the regional wastewater infrastructure managed by the local water authority. Treated effluent from Redacre STW is discharged into local watercourses that flow into the River Calder, a tributary of the River Aire. The River Calder eventually joins the River Ouse and drains into the Humber Estuary, which feeds into the North Sea. The plant plays a key role in protecting the water quality of these river systems and the downstream estuarine and marine environment.

Redacre STW discharges into the River Calder catchment, which flows through West Yorkshire before joining the River Aire and ultimately the Humber Estuary. The Humber Estuary is a major ecological feature supporting diverse aquatic life, including migratory fish species. The plant's treatment performance is critical to maintaining water quality in this sensitive river system, which is subject to agricultural and urban runoff pressures.