LOCHWINNOCH STW - Secondary Wastewater Treatment Plant in Lochwinnoch, Scotland

LOCHWINNOCH STW is a wastewater treatment plant located in Lochwinnoch, Renfrewshire, Scotland, serving a population of approximately 2,640. The plant is situated inland, within 50 km of the coast, and plays a key role in managing local wastewater for this rural community. The plant provides secondary treatment, which is the standard required under the Urban Waste Water Treatment (Scotland) Regulations for agglomerations of this size. With a designed capacity of 3,000 m³/day and a current discharge volume of 587.76 m³/day, the facility operates well within its capacity, ensuring effective treatment of incoming wastewater. The treated effluent is discharged into a local watercourse that flows into the River Clyde estuary, ultimately reaching the Firth of Clyde and the Irish Sea. This downstream environment supports diverse aquatic life and is important for regional biodiversity, including migratory fish species such as Atlantic salmon.

The plant discharges into a tributary of the River Clyde, which flows through Renfrewshire into the Firth of Clyde, a sea loch that connects to the Irish Sea. The downstream environment includes estuarine and coastal habitats that support diverse aquatic species, including salmon and sea trout. The area is ecologically sensitive, with nearby wetlands and woodlands contributing to local biodiversity.