Ekebyhov Avloppsanlaggning - Wastewater Treatment Plant in Ekerö, Sweden

Ekebyhov Avloppsanlaggning is a wastewater treatment plant located in Ekerö kommun, Stockholm County, Sweden. It serves a population of around 15,500 residents in the municipality. The plant is situated near Lake Mälaren, a major freshwater lake that supplies drinking water to Stockholm and supports diverse aquatic ecosystems. As a Swedish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. Sweden has implemented the directive through national regulations enforced by county administrative boards. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar unit), indicating it is sized to handle the local population's wastewater load. The treated effluent from Ekebyhov is discharged into the Lake Mälaren watershed, which ultimately drains into the Baltic Sea via the Stockholm archipelago. Lake Mälaren is a vital ecological and recreational resource, supporting fish species like pike and perch, and providing habitat for migratory birds. The plant's operation helps protect water quality in this sensitive freshwater system and downstream marine environment.

Ekebyhov Avloppsanlaggning discharges treated wastewater into the Lake Mälaren basin, which flows through the Stockholm archipelago into the Baltic Sea. Lake Mälaren is a large, oligotrophic lake that serves as a drinking water source for over 2 million people and supports diverse aquatic life, including salmonid fish. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. Effective wastewater treatment at Ekebyhov helps reduce eutrophication risks in both the lake and the downstream marine environment.