LLANFAGLAN STW Wastewater Treatment Plant, Llanfaglan, Gwynedd, Wales

LLANFAGLAN STW is a wastewater treatment facility located in the village of Llanfaglan, near Caernarfon in Gwynedd, Wales. The plant serves a population of around 5,252 people, classifying it as a small to medium agglomeration under UK wastewater regulations. It is situated in a rural area within 50 km of the coast, indicating potential sensitivity to marine environments. As a UK wastewater treatment plant, LLANFAGLAN STW operates under the Urban Waste Water Treatment (England and Wales) Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive. For agglomerations of this size, secondary treatment is typically required unless the receiving waters are designated as sensitive, in which case more stringent treatment may be mandated. The plant's designed capacity is 1.00 (likely in megaliters per day or similar units), suggesting it is appropriately scaled for the served population. The treated effluent from LLANFAGLAN STW is discharged into local watercourses that ultimately drain into the Menai Strait and the Irish Sea. This coastal discharge point is ecologically significant, as the Menai Strait supports diverse marine life, including important habitats for fish and bird species. The plant's operation is crucial for protecting the water quality of these sensitive coastal and marine environments from nutrient pollution and pathogens.

LLANFAGLAN STW discharges into local streams that flow into the Menai Strait, a narrow tidal channel separating Anglesey from mainland Wales. The Menai Strait is a dynamic marine environment that supports diverse aquatic life, including important fish populations and migratory birds. The strait connects to the Irish Sea, a larger marine ecosystem that is vital for fisheries and biodiversity. Effective wastewater treatment is essential to prevent nutrient enrichment and contamination in these sensitive coastal waters.