Holyhead WWTW STW - Wastewater Treatment Plant in Llaingoch, Wales

Holyhead WWTW STW is a wastewater treatment plant located in Llaingoch, near Holyhead on the Isle of Anglesey, Wales. It serves a population of 17,680, making it a medium-sized agglomeration under UK regulatory frameworks. The plant is situated in a coastal area, with its treated effluent ultimately reaching the Irish Sea. As a UK wastewater facility, Holyhead WWTW STW operates under the Urban Waste Water Treatment (England and Wales) Regulations, which transpose the EU Urban Waste Water Treatment Directive. For a population of this size, secondary treatment is typically required, with additional nutrient removal if discharging into sensitive areas. The plant's designed capacity is 1.00 (likely in megalitres per day or similar), indicating its scale. The plant's discharge contributes to the local hydrological cycle, with treated water flowing into nearby streams and then into the Irish Sea. The coastal environment around Anglesey supports diverse marine life, including seabird colonies and intertidal habitats. Proper treatment is essential to protect water quality in this ecologically sensitive region.

Holyhead WWTW STW discharges treated wastewater into local watercourses that drain into the Irish Sea. The coastal waters around Anglesey are ecologically important, supporting diverse marine life such as seabirds, seals, and intertidal communities. The area is part of the wider Irish Sea basin, which is influenced by tidal flows and provides critical habitat for fish and migratory species.