Overview
LLANGEFNI STW serves Pentre Berw on the Isle of Anglesey, Wales, treating wastewater for approximately 17,208 people. The plant operates under UK and EU regulations for secondary treatment.
LLANGEFNI STW is a wastewater treatment plant located near Pentre Berw on the Isle of Anglesey (Ynys Môn) in North Wales. It serves a population of approximately 17,208, classifying it as a medium agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated close to the North Wales Expressway and is part of the region's municipal wastewater infrastructure. As a UK plant, LLANGEFNI STW is regulated under the Water Industry Act 1991 and must comply with the EU UWWTD, which requires secondary treatment for discharges to freshwater and estuaries. The plant is expected to meet stringent effluent quality standards to protect the local environment. The plant discharges into the surrounding watershed, which drains into the Irish Sea. The Isle of Anglesey is an ecologically sensitive area with diverse coastal habitats, including salt marshes and mudflats that support birdlife and marine species. Proper treatment is essential to prevent nutrient enrichment and protect the region's natural beauty and biodiversity.
Environmental context
The plant's treated effluent ultimately reaches the Irish Sea via local streams and the Menai Strait. The Isle of Anglesey features a coastline of high ecological value, with designated Sites of Special Scientific Interest (SSSIs) and areas supporting migratory birds and marine life. The watershed is sensitive to nutrient inputs, making effective wastewater treatment critical for maintaining water quality and ecosystem health.
Frequently asked questions
LLANGEFNI STW is located near Pentre Berw on the Isle of Anglesey (Ynys Môn) in North Wales, United Kingdom. The address is near the North Wales Expressway in Llanfihangel Ysgeifiog.
The plant serves a population of approximately 17,208 people, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive.
The plant discharges treated effluent into local watercourses that flow into the Menai Strait and ultimately the Irish Sea. The discharge is regulated to meet environmental standards.
As a UK plant, it operates under the Water Industry Act 1991 and must comply with the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for discharges to coastal waters and estuaries.
Plants of this scale in the UK typically provide secondary treatment, often using activated sludge or biological filtration, to meet consent conditions set by the Environment Agency (Natural Resources Wales in this case).
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