Colwyn Bay & Llandudno STW: Wastewater Treatment Plant in Penrhyn-Side, Wales

Colwyn Bay & Llandudno STW is a wastewater treatment plant located in Penrhyn-Side, Conwy, Wales, serving a population of around 80,000. The facility is part of the wastewater infrastructure for the coastal communities of Colwyn Bay and Llandudno, situated on the northern coast of Wales. As a plant serving an agglomeration of over 15,000 people, it falls under the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum standard. The plant's designed capacity is 1.00 (likely in cubic meters per second or similar unit), indicating a substantial facility capable of handling the wastewater from the local population. The plant discharges treated effluent into the Irish Sea via the local coastal waters. The receiving environment supports diverse marine life and is an important area for migratory birds and coastal ecology. The treatment process helps protect the sensitive coastal ecosystem from nutrient pollution and pathogens.

The plant discharges into the Irish Sea, which receives runoff from the Conwy River and other smaller streams along the North Wales coast. This coastal area supports diverse marine habitats, including rocky shores and sandy beaches, and is important for seabirds and marine mammals. Proper treatment is essential to prevent eutrophication and maintain water quality for recreation and wildlife.