Chilton WINDLESTONE STW - Rushyford, County Durham Wastewater Treatment Plant

Chilton WINDLESTONE STW is a wastewater treatment plant located in Rushyford, County Durham, England, serving a population of around 10,829. The facility is part of the United Kingdom's wastewater infrastructure, managed under the Water Industry Act 1991 and regulated by the Environment Agency. As a medium-sized agglomeration, it is subject to the Urban Waste Water Treatment (England and Wales) Regulations 1994, which implement the EU Urban Waste Water Treatment Directive. The plant's designed capacity is 1.00 cubic meters per day, indicating a small-scale facility. Under UK regulations, treatment plants serving populations between 2,000 and 15,000 typically require secondary treatment or equivalent. The plant's discharge contributes to the local water cycle, with treated effluent entering nearby watercourses that drain into the River Wear catchment. The receiving water body ultimately flows into the North Sea via the River Wear estuary. The River Wear supports diverse aquatic life, including salmon and trout populations, and its estuary is an important habitat for migratory birds. The plant's operation helps protect downstream water quality and ecological health.

The plant discharges into the River Wear catchment, which flows eastward through County Durham to the North Sea at Sunderland. The River Wear supports a range of fish species, including Atlantic salmon and brown trout, and its estuary provides critical habitat for wading birds and waterfowl. The treatment plant helps maintain water quality in this ecologically sensitive river system, which is designated as a Site of Special Scientific Interest (SSSI) in parts.