EASTRIGGS STW - Secondary Wastewater Treatment Plant in Eastriggs, Scotland

EASTRIGGS STW is a municipal wastewater treatment plant located in Eastriggs, Dumfries and Galloway, Scotland, United Kingdom. The facility serves a population of 1,880 and operates with secondary treatment, a standard level for small agglomerations under the EU Urban Waste Water Treatment Directive (91/271/EEC). As a secondary treatment plant, EASTRIGGS STW provides biological treatment to reduce organic matter and suspended solids. The plant has a designed capacity of 2,017 m³/day and currently discharges 418.55 m³/day of treated effluent. Under the EU UWWTD, secondary treatment is required for all inland discharges, ensuring compliance with environmental standards. The treated wastewater from EASTRIGGS STW is discharged into the local water environment, which ultimately drains to the Solway Firth, a large estuary on the west coast of Scotland. The Solway Firth supports diverse aquatic life and is an important area for migratory birds and marine species. The plant's proximity to the coast (within 10 km) means its discharge can influence coastal water quality.

EASTRIGGS STW discharges treated effluent into the Solway Firth, a major estuary that flows into the Irish Sea. The Solway Firth is ecologically sensitive, supporting diverse habitats including salt marshes, mudflats, and sandbanks that are crucial for birdlife and marine species. The plant's secondary treatment helps protect this downstream environment from excessive nutrient loading and organic pollution.