RAF Lyneham STW - Secondary Wastewater Treatment Plant in Lyneham, Wiltshire

RAF Lyneham STW is a wastewater treatment plant located on Eider Avenue in Lyneham, Wiltshire, England. It serves a population of 3,901 people and operates as part of the United Kingdom's wastewater infrastructure under the regulatory framework of the Urban Waste Water Treatment Directive (UWWTD) transposed into UK law. The plant provides secondary treatment, which is the standard biological treatment stage required for agglomerations of this size under the UWWTD. With a designed capacity of 6,578 cubic meters per day and an actual discharge volume of 868.50 cubic meters per day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the River Thames catchment, contributing to the freshwater resources of southern England. The plant's inland location, over 50 km from the coast, means its discharge primarily affects riverine ecosystems rather than marine environments.

The plant discharges into local streams that feed into the River Thames basin, one of the UK's most significant river systems. The Thames flows through London and into the North Sea, supporting diverse aquatic life and providing drinking water for millions. The secondary treatment process reduces organic pollutants and suspended solids, protecting downstream water quality in this ecologically sensitive catchment.