WORKSOP STW Wastewater Treatment Plant, Bassetlaw, Nottinghamshire

WORKSOP STW is a municipal wastewater treatment plant located near Worksop in Bassetlaw, Nottinghamshire, England. It serves a population of around 64,500, placing it in the medium-to-large agglomeration category under UK regulations. The facility is situated inland, approximately 50 km from the coast, and its treated effluent is discharged into local rivers that ultimately drain into the North Sea via the Humber Estuary. As a UK wastewater treatment plant serving over 10,000 people, WORKSOP 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). These regulations require secondary treatment for discharges to freshwater and estuaries, with more stringent tertiary treatment if the receiving water is designated as sensitive. The regulatory framework ensures compliance with national standards for effluent quality. The plant's receiving water body is part of the River Idle catchment, which flows into the River Trent and then the Humber Estuary. This estuary is a major ecological feature supporting diverse bird life and fish populations. The plant's discharge contributes to the overall water quality in the catchment, which is managed under the Water Framework Directive to achieve good ecological status.

WORKSOP STW discharges into the River Idle catchment, a tributary of the River Trent. The Trent flows into the Humber Estuary, a large coastal plain estuary that supports internationally important bird populations and fish species such as salmon and eel. The catchment is predominantly rural with some industrial areas, and water quality is managed to protect aquatic life and downstream habitats.