Granna ARV - Advanced Wastewater Treatment in Gränna, Sweden

Granna ARV is a municipal wastewater treatment facility located in Gränna, Jönköping Municipality, Sweden. The plant serves a population of approximately 3,136 and operates with advanced treatment technology, ensuring high-quality effluent before discharge. As an advanced treatment plant, Granna ARV goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants discharging into sensitive water bodies. The plant has a designed capacity of 7,500 cubic meters per day and currently treats an average daily volume of about 492 cubic meters, indicating significant reserve capacity. The plant's treated effluent is discharged into the local environment near Lake Vättern, Sweden's second-largest lake. Lake Vättern is a deep, oligotrophic lake known for its clear waters and diverse aquatic life. The advanced treatment at Granna ARV helps protect the lake's water quality and supports its ecological health, including fish populations and recreational uses.

Granna ARV discharges treated wastewater into the local watershed that drains into Lake Vättern, a large and ecologically sensitive lake in southern Sweden. Lake Vättern is a deep, cold-water lake with high water quality, supporting species such as Arctic char and brown trout. The advanced treatment at the plant helps minimize nutrient loading, protecting the lake from eutrophication and preserving its role as a drinking water source and recreational area.