SOMERSHAM STW - Huntingdonshire Wastewater Treatment Plant, Cambridgeshire

SOMERSHAM STW is a wastewater treatment plant located in the village of Somersham, near Huntingdonshire in Cambridgeshire, England. It serves a population of around 7,052 residents, making it a small to medium agglomeration under UK regulatory classifications. The plant is situated in a rural area within the Cambridgeshire Fens, a low-lying region with extensive drainage systems. As a UK wastewater facility, SOMERSHAM STW operates under the Water Industry Act 1991 and is regulated by the Environment Agency. For agglomerations of this size, the Urban Waste Water Treatment (England and Wales) Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive, typically require secondary treatment. The plant's treatment process and capacity details are not publicly available, but it is expected to meet the relevant discharge standards for its receiving environment. The treated effluent from SOMERSHAM STW is discharged into local watercourses that ultimately drain into the Great Ouse river system. The Great Ouse flows through the Fens to The Wash, an ecologically important estuary and a designated Site of Special Scientific Interest (SSSI). The plant's operations contribute to protecting the water quality of these sensitive downstream habitats.

SOMERSHAM STW discharges into local drainage channels within the Great Ouse catchment, which flows through the Cambridgeshire Fens to The Wash estuary. The Wash is a major wetland supporting diverse bird populations and marine life. The Fens region is characterized by low-lying, artificially drained agricultural land, making water quality management crucial for both ecological health and flood control.