Kidwelly Wastewater Treatment Works STW - Secondary Treatment Plant in Carmarthenshire, Wales

Kidwelly Wastewater Treatment Works STW is a municipal wastewater facility located on Quay Road in Kidwelly, Carmarthenshire, Wales. The plant serves a population of approximately 4,420 people and operates under secondary treatment standards, as required by the EU Urban Waste Water Treatment Directive for agglomerations of this size. The plant has a designed capacity of 4,420 population equivalents and treats an average daily flow of 984.05 cubic meters. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant is situated within 10 kilometers of the coast, indicating its effluent may influence coastal water quality. The treated effluent is discharged into local watercourses that drain into the Carmarthen Bay, part of the Bristol Channel and ultimately the Celtic Sea. The receiving waters support diverse marine life and are important for local fisheries and tourism. The plant's operation is critical for protecting the coastal environment from untreated sewage.

The plant discharges into local rivers that flow into the Carmarthen Bay, a coastal inlet of the Bristol Channel. This area supports diverse aquatic ecosystems, including important fish spawning grounds and migratory bird habitats. The proximity to the coast means that treated effluent can affect bathing water quality and marine biodiversity, making effective treatment essential.