USK STW Graig Olway Farm Llangview STW - Secondary Wastewater Treatment in Llanllowell, Wales

USK STW Graig Olway Farm Llangview STW is a wastewater treatment plant located near Llanllowell in Monmouthshire, Wales, United Kingdom. The facility serves a population equivalent of 2,877 and operates under secondary treatment standards, which is the baseline requirement under the EU Urban Waste Water Treatment Directive for inland agglomerations of this size. The plant has a designed capacity of 2,877 population equivalent and discharges an average daily volume of 640.52 m³ of treated effluent. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant is situated within 10 km of the coast, indicating its discharge may influence coastal water quality. The treated effluent from the plant ultimately drains into the River Usk catchment, which flows into the Severn Estuary and the Bristol Channel. This estuarine environment supports diverse aquatic life and is an important migratory corridor for fish species. The plant's operation is regulated under the Water Environment (Water Framework Directive) (England and Wales) Regulations 2017.

The plant discharges into the River Usk catchment, which flows into the Severn Estuary, a large macro-tidal estuary that supports diverse aquatic habitats and migratory fish. The estuary is ecologically sensitive due to its high productivity and role as a nursery ground for marine species. The plant's coastal proximity means its effluent can influence local water quality and the health of downstream ecosystems.