MACHYNLLETH STW STW - Secondary Wastewater Treatment Plant in Gwynedd, Wales

MACHYNLLETH STW STW is a wastewater treatment plant located in Gwynedd, Wales, United Kingdom. It serves a population of approximately 2,916 people and operates with secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive for agglomerations of this size. The plant is situated near the town of Machynlleth in the historic county of Montgomeryshire, within the Dyfi Valley region. The plant has a designed capacity of 2,916 population equivalents and a daily discharge volume of 649.20 cubic meters. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids. Under UK regulations, which transpose the EU directive, secondary treatment is mandatory for inland discharges and is expected for coastal discharges unless a less stringent regime is permitted. The treated effluent from MACHYNLLETH STW STW is discharged into the local environment, ultimately reaching the Dyfi Estuary and Cardigan Bay in the Irish Sea. The Dyfi Estuary is a designated Site of Special Scientific Interest (SSSI) and supports diverse aquatic life, including salmon and sea trout. The plant's coastal location means its discharge must meet strict environmental standards to protect the sensitive marine ecosystem.

The plant discharges into the Dyfi catchment, which flows into the Dyfi Estuary and then Cardigan Bay in the Irish Sea. The estuary is ecologically sensitive, supporting migratory fish species and extensive saltmarsh habitats. The coastal location requires careful management of nutrient and pollutant loads to prevent eutrophication and protect marine biodiversity.