LONGTOWN STW - Secondary Wastewater Treatment Plant in Longtown, England

LONGTOWN STW is a municipal wastewater treatment plant located in Longtown, Cumberland, England, serving a population of approximately 2,789. The plant is situated near the A7 road in Kirkandrews, close to the Scottish border, and operates under the regulatory framework of the United Kingdom. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater and estuarine discharges from agglomerations of this size. The designed capacity is 2,839 m³/day, with an average daily discharge volume of 620.93 m³/day, indicating operational headroom. The treated effluent is discharged into local watercourses that drain into the Solway Firth, a large tidal estuary on the Irish Sea. The Solway Firth supports diverse aquatic life, including salmon and sea trout, and is an important migratory corridor for birds. The plant's coastal proximity means its discharge contributes to the overall nutrient load entering the estuary.

The plant discharges into watercourses that flow into the Solway Firth, a major estuary on the Irish Sea. The Solway Firth supports diverse aquatic habitats, including salt marshes and mudflats, and is an important area for migratory birds and fish species such as Atlantic salmon. The estuary's ecological health depends on controlling nutrient inputs from wastewater and agricultural runoff.