Billinghay STW - Secondary Wastewater Treatment in North Kesteven, Lincolnshire

Billinghay STW (Sewage Treatment Works) is located in North Kesteven, Lincolnshire, England, serving a population of 2,499. The plant is part of the United Kingdom's wastewater infrastructure, managed under the regulatory framework of the Environment Agency. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant has a designed capacity of 4,039 cubic meters per day and an average discharge volume of 556.36 cubic meters per day, indicating it operates well below its design capacity. Under the UK's Urban Waste Water Treatment Regulations (transposing the EU Urban Waste Water Treatment Directive), secondary treatment is the minimum standard for inland plants serving populations between 2,000 and 10,000, which aligns with Billinghay's scale. The treated effluent is discharged into local watercourses that drain into the River Witham catchment, ultimately reaching The Wash, a large estuary and nature conservation area on the east coast of England. The plant plays a role in protecting the water quality of these sensitive downstream environments.

Billinghay STW discharges into local watercourses that are part of the River Witham catchment. The River Witham flows through Lincolnshire and empties into The Wash, a large estuary and designated Site of Special Scientific Interest (SSSI) that supports diverse birdlife and marine habitats. The plant's secondary treatment helps reduce nutrient and organic pollution, which is critical for maintaining the ecological health of the Witham and the downstream coastal waters.