LLANNANT WWTW Llannant Road Swansea STW - Gorseinon, Wales Wastewater Treatment Plant

LLANNANT WWTW (Wastewater Treatment Works) is located on Llannant Road in Gorseinon, near Swansea, Wales, United Kingdom. The plant serves a population of approximately 12,450 people, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). It is situated within 50 km of the coast, indicating potential influence on coastal water quality. As a plant in the United Kingdom, LLANNANT WWTW operates under the regulatory framework of the EU Urban Waste Water Treatment Directive (91/271/EEC), which is implemented by the UK Environment Agency. For agglomerations of this size (10,000-15,000 population equivalent), the directive typically requires secondary treatment as a minimum, with more stringent treatment if the discharge is to sensitive areas. The treated effluent from LLANNANT WWTW is discharged into the local water environment, which ultimately drains into the Bristol Channel via the River Loughor or nearby coastal waters. The receiving water body supports diverse aquatic life and is important for migratory fish species. The plant's proximity to the coast means its discharge can affect bathing water quality and marine ecosystems, making compliance with discharge permits critical for environmental protection.

LLANNANT WWTW discharges into the local catchment that drains to the Bristol Channel, a major estuary and sea inlet. The Bristol Channel supports diverse marine life, including important fish nurseries and bird populations. The plant's location near the coast means its effluent can influence coastal water quality, particularly for nearby bathing waters and shellfish waters. Effective treatment is essential to protect these sensitive downstream environments from nutrient enrichment and pollution.