Stockeviks avloppsreningsverk – Advanced Wastewater Treatment in Fiskebäckskil, Sweden

Stockeviks avloppsreningsverk is a municipal wastewater treatment plant located in Fiskebäckskil, a coastal village in Lysekils kommun, Västra Götaland County, Sweden. The plant serves a population of approximately 2,489 people, classifying it as a small agglomeration under Swedish and EU regulations. The plant employs advanced treatment processes, which typically include biological nutrient removal and disinfection, ensuring high-quality effluent. With a designed capacity of 6,500 cubic meters per day and an average discharge volume of 390.73 cubic meters per day, the plant operates well below its capacity, indicating room for future growth. As a Swedish facility, it complies with the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas and coastal discharges. The treated wastewater is discharged into the coastal waters of the Skagerrak, a marginal sea of the North Sea. The discharge point is within 10 km of the coast, near the Gullmarn fjord, a unique marine ecosystem known for its deep-water coral reefs and diverse marine life. The plant's advanced treatment helps protect this sensitive coastal environment from nutrient pollution and other contaminants.

The plant discharges into the Skagerrak, which connects to the North Sea and ultimately the Atlantic Ocean. The nearby Gullmarn fjord is an ecologically sensitive area with unique marine habitats, including cold-water corals. Advanced treatment reduces nutrient loads, protecting the fjord's biodiversity and supporting healthy fish populations.