MARCH STW Wastewater Treatment Plant, Fenland, Cambridgeshire

MARCH STW is a wastewater treatment plant located in Creek Fen, March, within the Fenland district of Cambridgeshire, England. It serves a population of around 20,742, placing it in the medium agglomeration category under UK regulatory frameworks. The plant is situated in a rural fenland area, part of the broader Cambridgeshire and Peterborough region. As a UK wastewater facility, MARCH STW operates under the Urban Waste Water Treatment (England and Wales) Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive 91/271/EEC. For agglomerations of this size (between 10,000 and 150,000 population equivalent), secondary treatment is typically required. This suggests it may be a small to medium facility. The treated effluent from MARCH STW is discharged into local watercourses that drain into the River Great Ouse system, which flows through the Fens to The Wash, a large estuary and embayment of the North Sea. The Fens are a low-lying, agriculturally intensive region with a network of drainage channels, making water quality management critical for both ecological health and flood control.

MARCH STW discharges into the local fenland drainage network, which ultimately feeds into the River Great Ouse and then The Wash, a major estuary on the North Sea coast. The Wash supports diverse bird populations and is an important migratory corridor for waterfowl. The surrounding Fens are a highly modified agricultural landscape where nutrient management is essential to prevent eutrophication in downstream waters.