Burnley STW - Wastewater Treatment Plant in Pendle, Lancashire, England

Burnley STW is a wastewater treatment plant located in Reedley, Pendle, Lancashire, England. It serves a population of approximately 132,369, classifying it as a large agglomeration under UK and EU standards. The plant is situated inland, near the River Calder, and plays a key role in managing wastewater from the Pendle area. As a large treatment facility, Burnley STW operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant's treatment processes are designed to meet stringent effluent standards to protect the receiving water environment. The facility is part of the broader wastewater infrastructure managed by United Utilities, the regional water company. The treated effluent from Burnley STW is discharged into the River Calder, which flows into the River Ribble and eventually into the Irish Sea. The plant's operations are critical for maintaining water quality in the Ribble catchment, which supports diverse aquatic life and is used for recreation and agriculture. The surrounding area includes the Forest of Bowland, an Area of Outstanding Natural Beauty, highlighting the importance of effective wastewater treatment.

Burnley STW discharges treated effluent into the River Calder, a tributary of the River Ribble. The Ribble catchment drains into the Irish Sea near Lytham St Annes. The river supports a variety of fish species, including salmon and trout, and the estuary is an important habitat for migratory birds. Effective treatment at Burnley STW helps maintain water quality in this ecologically sensitive river system.