WALKERINGHAM STW - West Lindsey, England | Secondary Wastewater Treatment Plant

WALKERINGHAM STW (Sewage Treatment Works) is located in the West Lindsey district of Lincolnshire, England, near the village of Walkerith. The plant serves a population of around 4,428, classifying it as a small agglomeration under UK water industry standards. It is situated inland, approximately 50 km from the coast. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC), retained in UK law post-Brexit. For a population of this size, secondary treatment is the expected minimum. The plant has a designed capacity of 4,750 m³/day, with a current discharge volume of 985.83 m³/day, indicating operational headroom. Treated effluent from the plant is discharged into local watercourses that drain into the River Trent, a major river in the East Midlands. The River Trent flows into the Humber Estuary, a large tidal estuary that supports diverse aquatic life and important bird populations. The plant's operation helps protect water quality in this ecologically significant catchment.

The plant discharges into local watercourses that are part of the River Trent catchment. The Trent flows through the East Midlands and into the Humber Estuary, which is a major ecological feature supporting migratory fish, wading birds, and diverse wetland habitats. The estuary is a vital corridor for species such as salmon and eels. Maintaining high water quality through effective treatment is essential to protect this downstream environment from nutrient enrichment and pollution.