Chatteris STW - Wastewater Treatment Plant in Fenland, Cambridgeshire, England

Chatteris STW is a wastewater treatment plant located in Fenland, Cambridgeshire, England, serving a population of around 10,441. The plant is situated inland, more than 50 km from the coast, and plays a key role in managing municipal wastewater for the Chatteris area. As a UK wastewater facility, Chatteris STW operates under the Water Industry Act 1991 and is regulated by the Environment Agency. For a plant serving a medium agglomeration of about 10,000 people, secondary treatment is typically required under the Urban Waste Water Treatment (England and Wales) Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive. The treated effluent from Chatteris STW is discharged into local watercourses that drain into the River Great Ouse system, eventually reaching The Wash, a large estuary and ecologically important area on the North Sea coast. The plant helps protect these downstream environments from nutrient pollution and other contaminants.

Chatteris STW discharges into local drains and ditches that flow into the River Great Ouse, which meanders through the Fens to The Wash estuary. The Wash is a major wetland supporting diverse birdlife, including migratory waterfowl, and is designated as an ecologically sensitive area. The plant's treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in this downstream environment.