Overview
Margretelund Avloppsanlaggning serves Åkersberga, Sweden, treating wastewater for approximately 26,000 people. The plant operates under Sweden's implementation of the EU Urban Waste Water Treatment Directive.
Margretelund Avloppsanlaggning is a wastewater treatment plant located in Åkersberga, Österåker municipality, Stockholm County, Sweden. It serves a population of approximately 26,076, classifying it as a medium-sized agglomeration under EU regulations. 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. The plant's designed capacity is 1.00 (likely in thousand cubic meters per day or similar unit), indicating it is sized to handle the local wastewater load. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Baltic Sea via the Stockholm archipelago. This coastal discharge point is within 50 km of the coast, making the plant's performance important for protecting the sensitive marine environment of the Baltic Sea, which is subject to eutrophication concerns.
Environmental context
The plant discharges into the Stockholm archipelago, part of the Baltic Sea, a brackish water body highly sensitive to nutrient pollution. The Baltic Sea faces eutrophication from nitrogen and phosphorus inputs, making effective wastewater treatment critical. The local watershed includes streams and coastal zones that support diverse aquatic life and serve as important habitats for fish and bird species.
Frequently asked questions
Margretelund Avloppsanlaggning is located in Åkersberga, Österåker municipality, Stockholm County, Sweden.
The plant serves approximately 26,076 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is discharged into the local watershed, which flows into the Stockholm archipelago and ultimately the Baltic Sea.
As a Swedish plant serving over 10,000 people, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment and, in sensitive areas like the Baltic Sea catchment, may require tertiary treatment for nutrient removal.
In Sweden, plants of this scale typically provide at least secondary biological treatment, often with phosphorus removal to protect the Baltic Sea from eutrophication.
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