Creagh Wastewater Treatment Plant, County Londonderry, Northern Ireland

Creagh wastewater treatment plant is located in County Londonderry, Northern Ireland, United Kingdom. It serves a population of 2,046 and operates under the regulatory framework of the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for wastewater treatment across member states. The plant provides secondary treatment, which is the standard requirement for agglomerations of this size under the EU directive. It has a designed capacity of 4,400 m³/day and currently discharges 455.51 m³/day of treated effluent. The plant is situated inland, away from coastal areas, reducing direct marine impact. The treated effluent is discharged into local watercourses that flow into the River Bann catchment, eventually reaching the Atlantic Ocean via Lough Neagh and the North Channel. The plant plays a role in protecting the water quality of the Bann system, which supports diverse aquatic life and is important for local ecology and recreation.

The plant discharges into the River Bann catchment, which drains into Lough Neagh, the largest freshwater lake in the British Isles. From Lough Neagh, water flows via the Lower Bann to the Atlantic Ocean at the North Channel. The Bann system supports salmon, trout, and eel populations, and the plant's secondary treatment helps maintain water quality in this ecologically sensitive watershed.