Bolton on Dearne STW - Doncaster Wastewater Treatment Plant, England

Bolton on Dearne STW is a wastewater treatment plant located in Doncaster, South Yorkshire, England. It serves a population of around 24,154, classifying it as a medium-sized agglomeration under UK and EU wastewater directives. The plant is situated near the River Dearne, a tributary of the River Don, which flows through the Yorkshire region. As a UK wastewater facility, Bolton on Dearne STW is regulated 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, secondary treatment is typically required, with tertiary treatment in sensitive areas. The plant's treatment process and capacity details are not publicly available, but it is expected to meet the regulatory standards for biological oxygen demand and suspended solids. The plant discharges treated effluent into the River Dearne, which joins the River Don near Mexborough. The River Don flows eastward through South Yorkshire and eventually into the Humber Estuary, a major ecological and economic waterway. The Dearne and Don catchments support diverse aquatic life and are important for flood management and water quality in the region.

Bolton on Dearne STW discharges into the River Dearne, a tributary of the River Don. The River Don flows through South Yorkshire and joins the River Ouse at the Humber Estuary, which drains into the North Sea. The catchment supports a variety of fish species, including brown trout and grayling, and is an important corridor for migratory birds. The plant's discharge must comply with water quality standards to protect the ecological health of the Dearne and downstream waters.