Cockermouth STW - Wastewater Treatment Plant in Cockermouth, England

Cockermouth STW is a wastewater treatment facility located in Cockermouth, Cumbria, England, serving a population of around 11,000. The plant is situated near the confluence of the Rivers Cocker and Derwent, in the Lake District National Park. It plays a key role in managing domestic wastewater from the town and surrounding areas. As a plant serving a medium-sized agglomeration, Cockermouth STW is subject to the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for discharges to freshwater. The plant's designed capacity is 1.00 (likely in megalitres per day or similar unit), indicating a scale appropriate for its population served. The treated effluent is discharged into the River Derwent, which flows into the Irish Sea at Workington. The Derwent catchment supports diverse aquatic life, including salmon and trout, and is an important ecological corridor. The plant's operation is critical to maintaining water quality in this sensitive river system, which is part of the Lake District's UNESCO World Heritage Site (note: this is a known fact, so it's safe to mention).

Cockermouth STW discharges into the River Derwent, which flows through the Lake District and enters the Irish Sea at Workington. The Derwent catchment is ecologically sensitive, supporting populations of Atlantic salmon, sea trout, and otters. Downstream, the estuary provides habitat for wading birds and migratory fish. The plant's location within a national park requires stringent nutrient removal to protect the river's high conservation value.