SPILSBY STW - East Lindsey, Lincolnshire | Secondary Wastewater Treatment

SPILSBY STW is a wastewater treatment plant located in East Lindsey, Lincolnshire, England. The facility serves a population of around 4,148 and is part of the region's municipal wastewater infrastructure. It operates under the regulatory framework of the UK Environment Agency, which enforces standards aligned with the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, a standard level for agglomerations of this size under UK regulations. It has a designed capacity of 7,206 m³/day and currently discharges 923.49 m³/day of treated effluent. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that drain into the North Sea via the Lincolnshire coast. The plant plays a key role in protecting the region's freshwater ecosystems and downstream coastal waters from pollution, supporting aquatic life and recreational uses.

The plant discharges into local streams that flow towards the North Sea via the Lincolnshire coast. The receiving waters support diverse aquatic life and are part of a broader catchment that includes agricultural and rural areas. Protecting these water bodies from nutrient enrichment and contaminants is critical for maintaining ecological balance and water quality in the downstream coastal environment.