Overview
LLANDYRNOG S STW serves approximately 9,770 people in Llandyrnog, Denbighshire, Wales. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
LLANDYRNOG S STW is a municipal wastewater treatment plant located in Llandyrnog, Denbighshire, Wales, United Kingdom. It serves a population of around 9,770, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), which the UK implemented prior to Brexit and continues to uphold through national legislation. As a plant serving between 2,000 and 10,000 people, it is required to provide secondary treatment under the Directive. The designed capacity is 1.00 (likely in megalitres per day or similar unit), indicating the plant's infrastructure is sized for its current load. The plant is expected to meet the standards set by the UK Environment Agency or Natural Resources Wales. The treated effluent is discharged into local watercourses that drain into the River Clwyd or its tributaries, eventually reaching the Irish Sea. The plant plays a key role in protecting the region's rivers and coastal waters from pollution, supporting aquatic life and recreational use of the Dee and Clwyd estuaries.
Environmental context
The plant discharges into the River Clwyd catchment, which flows northward through Denbighshire and into the Irish Sea near Rhyl. This coastal area supports diverse marine life and is an important migratory corridor for salmon and sea trout. The region's rivers are designated under the Water Framework Directive for good ecological status, requiring effective nutrient removal to prevent eutrophication in the estuary.
Frequently asked questions
LLANDYRNOG S STW is located in Llandyrnog, Denbighshire, in the Cymru / Wales region of the United Kingdom.
The plant serves approximately 9,770 people, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive.
Treated effluent is discharged into local watercourses within the River Clwyd catchment, which flows into the Irish Sea.
The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. Compliance is overseen by Natural Resources Wales.
Under the Urban Waste Water Treatment Directive, plants serving between 2,000 and 10,000 population equivalent are required to provide secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids.
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