RHYDLAFAR ST STW - Secondary Wastewater Treatment Plant in Cardiff, Wales

RHYDLAFAR ST STW is a wastewater treatment plant located on Llantrisant Road in Rhydlafar, St. Fagans, Cardiff, Wales. The facility serves a population of approximately 2,840 and operates under the regulatory framework of the United Kingdom, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. The plant provides secondary treatment, a standard level required for inland freshwater discharges under UK regulations. The designed capacity is 2,840 population equivalent, and the average daily discharge volume is 632.28 cubic meters. The plant is situated within 10 km of the coast, indicating its proximity to the Severn Estuary. Treated effluent from the plant ultimately drains into the Severn Estuary, a major tidal water body that supports diverse aquatic life and migratory fish species. The estuary is ecologically significant as a feeding and breeding ground for birds and marine organisms, and it connects to the Bristol Channel and the Atlantic Ocean.

The plant discharges into the Severn Estuary, a large tidal estuary that receives flows from multiple rivers including the Taff and Ely. The estuary supports diverse aquatic life, including salmon and sea trout, and serves as an important migratory corridor for birds. Downstream, the estuary opens into the Bristol Channel and the Atlantic Ocean, making the treatment plant's discharge quality critical for maintaining coastal water quality.