DREFACH_VELI STW - Secondary Wastewater Treatment Plant in Waungilwen, Carmarthenshire

DREFACH_VELI STW is a wastewater treatment plant located near Waungilwen in Carmarthenshire, Wales, United Kingdom. The facility serves a population equivalent of approximately 2,445 people and operates under secondary treatment standards, which is the minimum required for inland freshwater discharges under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant has a designed capacity of 2,519 m³/day and currently discharges an average volume of 544.34 m³/day of treated effluent. As a secondary treatment plant, it employs biological treatment processes to reduce organic matter and suspended solids before discharge. The facility is situated more than 10 km from the coast but within 50 km, indicating its discharge likely enters inland waters that eventually reach the sea. The treated effluent from DREFACH_VELI STW is discharged into local watercourses within the Teifi River catchment, which flows into Cardigan Bay (Bae Ceredigion) in the Irish Sea. This area supports diverse aquatic life and is important for migratory fish species such as salmon and sea trout. The plant's operation helps protect the water quality of the Teifi catchment, which is designated as a Site of Special Scientific Interest (SSSI) for its ecological value.

DREFACH_VELI STW discharges into the Teifi River catchment, which flows into Cardigan Bay in the Irish Sea. The Teifi is a designated salmonid river supporting Atlantic salmon, sea trout, and European eel. The downstream environment includes estuarine habitats that are important for birdlife and marine species. The plant's secondary treatment helps maintain water quality standards in this ecologically sensitive catchment.