Wooler STW - Secondary Wastewater Treatment Plant in Wooler, Northumberland

Wooler STW is a municipal wastewater treatment plant located in Wooler, Northumberland, in the North East of England. It serves a small population of around 1,841 residents, reflecting its role in a rural community. The plant is situated inland, more than 10 km from the coast, but within 50 km of the North Sea coastline. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 2,211 cubic meters per day, and the current discharge volume is 409.87 cubic meters per day, indicating operational headroom. As a UK facility, it operates under the Water Industry Act 1991 and is regulated by the Environment Agency. The treated effluent is discharged into the River Till catchment, which flows into the River Tweed and eventually reaches the North Sea. The River Tweed is a Site of Special Scientific Interest (SSSI) and supports diverse aquatic life, including Atlantic salmon and otters. The plant's secondary treatment helps protect this ecologically important river system from nutrient pollution.

Wooler STW discharges into the River Till, a tributary of the River Tweed, which flows into the North Sea at Berwick-upon-Tweed. The River Tweed is a major salmon river and supports a rich ecosystem, including lamprey and otter populations. The plant's secondary treatment reduces organic load and suspended solids, helping to maintain water quality in this sensitive catchment. The North Sea receives the final discharge, where nutrient inputs can affect coastal marine habitats.