Coalisland Wastewater Treatment Plant, County Tyrone, Northern Ireland

The Coalisland wastewater treatment plant is located in Coalisland, County Tyrone, Northern Ireland, within the Mid-Ulster District Council area. It serves a population of approximately 12,095, classifying it as a medium agglomeration under EU regulations. The plant is situated inland, away from coastal areas, and discharges into local watercourses that ultimately drain into the Atlantic Ocean via Lough Neagh and the River Bann. As a plant serving a population between 10,000 and 150,000, 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 is part of the wastewater infrastructure managed by Northern Ireland Water, the public utility responsible for water and wastewater services in the region. The regulatory framework ensures compliance with environmental standards for inland discharges. The receiving water body is likely a tributary of the River Blackwater, which flows into Lough Neagh, the largest lake in the British Isles. Lough Neagh supports diverse aquatic life and is an important site for migratory birds. The treated effluent contributes to the overall water quality of the lough and downstream River Bann, which discharges into the Atlantic Ocean. The plant's operation is critical for protecting the ecological health of this significant freshwater system.

The plant discharges into the River Blackwater catchment, which flows into Lough Neagh, the largest freshwater lake in the British Isles. Lough Neagh supports a rich ecosystem, including populations of pollan, eels, and migratory birds such as whooper swans and ducks. The lake drains via the River Bann to the Atlantic Ocean, making the plant's treatment performance important for both local and downstream water quality. The region's temperate maritime climate and agricultural land use mean that nutrient management is a key consideration for preventing eutrophication in the lough.