Marsh Gibbon STW - Secondary Wastewater Treatment Plant, Buckinghamshire, England

Marsh Gibbon STW is a wastewater treatment plant located on Scotts Lane in Marsh Gibbon, Buckinghamshire, England. It serves a population of approximately 2,400 residents in this rural village and operates as part of the UK's municipal wastewater infrastructure. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC), now retained in UK law. With a designed capacity of 2,408 cubic meters per day and a discharge volume of 534 cubic meters per day, the plant operates well below its capacity, indicating headroom for future growth. The treated effluent is discharged into local surface waters that ultimately drain into the River Thames catchment. This waterway supports diverse aquatic life and flows through the Thames Valley before reaching the North Sea. The plant's operation helps protect the local environment from untreated sewage pollution.

Marsh Gibbon STW discharges into local streams that feed the River Ray, a tributary of the River Great Ouse, which flows into the Wash estuary and the North Sea. The surrounding area is rural and ecologically sensitive, supporting farmland and small woodlands. The plant's secondary treatment reduces organic pollutants and nutrients, helping to maintain water quality in the downstream river system.