Chesterfield STW Wastewater Treatment Plant, Chesterfield, Derbyshire, England

Chesterfield STW is a wastewater treatment plant located in New Whittington, Chesterfield, Derbyshire, in the East Midlands of England. It serves a population of around 120,879, classifying it as a large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from the coast, and discharges into local watercourses that ultimately drain into the North Sea. As a large agglomeration, the plant is expected to provide secondary treatment as a minimum, with tertiary treatment required if discharging into sensitive areas. The UK regulatory framework, enforced by the Environment Agency, mandates compliance with discharge permits to protect water quality. Its scale suggests a robust infrastructure to handle the wastewater load. The plant's treated effluent likely enters the River Rother or a tributary, which flows into the River Don, then the Humber Estuary, and finally the North Sea. This catchment supports diverse aquatic life and is important for regional water quality. The plant plays a key role in reducing nutrient and pollutant loads to protect downstream ecosystems.

Chesterfield STW discharges into the River Rother catchment, which flows into the River Don and then the Humber Estuary, a major ecological feature supporting migratory fish and bird populations. The Humber Estuary is a vital habitat for species such as the European eel and various waterfowl. The plant's operations help maintain water quality in this sensitive downstream environment, reducing the risk of eutrophication and protecting biodiversity.