Uddevalla avloppsreningsverk - Municipal Wastewater Treatment Plant in Uddevalla, Sweden

Uddevalla avloppsreningsverk is a municipal wastewater treatment plant located in Uddevalla, Västra Götaland County, Sweden. The plant serves a population of approximately 60,000 people, classifying it as a medium to large agglomeration under EU classification. It is situated near the coast of the Skagerrak, a sea area connected to the North Sea. As a Swedish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. For discharges to sensitive areas, tertiary treatment may be required. The regulatory framework ensures compliance with national and EU standards for effluent quality. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Skagerrak via the Byfjorden fjord. This coastal environment supports diverse marine life and is an important area for fisheries and recreation. The plant's operation is critical for protecting the water quality of the fjord and the broader Skagerrak ecosystem.

The plant's treated effluent flows into the Byfjorden fjord, a coastal inlet of the Skagerrak, which connects to the North Sea and ultimately the Atlantic Ocean. The Skagerrak is a nutrient-sensitive marine area where excessive nitrogen and phosphorus can lead to eutrophication and algal blooms. The plant's performance is therefore important for maintaining the ecological balance of the fjord and supporting local marine biodiversity, including fish stocks and benthic habitats.