Gallstad avloppsreningsverk - Advanced Wastewater Treatment in Gällstad, Sweden

Gallstad avloppsreningsverk is a wastewater treatment facility located in Gällstad, Ulricehamn municipality, Västra Götaland County, Sweden. The plant serves a population of approximately 1,621 people and has a designed capacity of 3,000 m³/day, with a current discharge volume of 254.47 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), Sweden requires advanced treatment for agglomerations discharging into sensitive areas, and this plant's treatment level aligns with that standard. The treated effluent is discharged into the local watershed, which ultimately drains into the Baltic Sea via the Viskan River system. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's waterways.

The plant discharges into the local watershed within the Viskan River basin, which flows westward into the Kattegat and the Baltic Sea. The surrounding area includes forests and agricultural land, and the plant's advanced treatment helps reduce nutrient loading that could otherwise contribute to eutrophication in downstream coastal waters. The region supports diverse aquatic life and is part of Sweden's efforts to maintain good ecological status under the EU Water Framework Directive.