Wilmslow STW - Wastewater Treatment Plant in Styal, England

Wilmslow STW is a wastewater treatment plant located in Styal, Cheshire East, England, serving a population of around 23,377. The facility is part of the United Kingdom's wastewater infrastructure, which is regulated under the Urban Waste Water Treatment (England and Wales) Regulations 1994, transposing the EU Urban Waste Water Treatment Directive. As a medium-sized agglomeration, the plant is expected to provide secondary treatment as a minimum standard. UK regulations require that plants serving populations between 10,000 and 150,000 meet secondary treatment standards. The facility likely employs conventional biological treatment methods such as activated sludge or trickling filters to meet discharge consent conditions set by the Environment Agency. Treated effluent from Wilmslow STW is discharged into the local water environment, ultimately draining into the River Bollin and then the Manchester Ship Canal, which flows into the Irish Sea. The plant plays a key role in protecting the water quality of these water bodies and supporting aquatic ecosystems in the region.

Wilmslow STW discharges into the River Bollin, a tributary of the Manchester Ship Canal, which flows into the Irish Sea. The River Bollin supports diverse aquatic life, including fish species such as brown trout and grayling. The plant's operations help maintain water quality in this ecologically sensitive catchment, which is important for both wildlife and recreational use.