MARLBOROUGH MARLBOROUGH WILTS STW - Wastewater Treatment Plant in Marlborough, Wiltshire

MARLBOROUGH MARLBOROUGH WILTS STW is a wastewater treatment plant located in Marlborough, Wiltshire, England. It serves a population of around 10,200, classifying it as a medium-sized agglomeration under UK and EU regulatory frameworks. The plant is situated inland, more than 50 km from the coast. As a UK wastewater facility, the plant operates under the Urban Waste Water Treatment (England and Wales) Regulations, which transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). For a population equivalent of 10,200, secondary treatment is typically required, with tertiary treatment if discharging into sensitive areas. Regulatory compliance ensures appropriate treatment standards. The treated effluent is discharged into a local watercourse, likely a tributary of the River Kennet, which flows into the River Thames and eventually the North Sea. The River Kennet is a chalk stream of high ecological importance, supporting diverse aquatic life including brown trout and water crowfoot. The plant plays a key role in protecting this sensitive river system from nutrient pollution.

The plant discharges into the River Kennet catchment, a chalk stream renowned for its clear waters and rich biodiversity. The River Kennet flows into the River Thames, which drains into the North Sea via the Thames Estuary. Chalk streams are rare and ecologically sensitive habitats, supporting species such as the European eel, bullhead, and various mayflies. Nutrient removal is critical to prevent eutrophication and maintain water quality in this protected river system.