Overview
AHSA Interkommunale avlopsanlegg in Askim, Norway, serves approximately 30,000 people. The plant operates under Norway's implementation of the EU Urban Waste Water Treatment Directive.
AHSA Interkommunale avlopsanlegg is a municipal wastewater treatment plant located in Askim, Indre Østfold, Østfold, Norway. It serves a population of about 30,019, classifying it as a medium agglomeration under Norwegian and EU regulations. The plant is situated inland, approximately 50 km from the coast, and its discharge ultimately reaches the Oslofjord via local waterways. As a Norwegian facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), implemented through national regulations. For agglomerations of this size (between 10,000 and 100,000 population equivalent), the directive requires secondary treatment as a minimum, with tertiary treatment in sensitive areas. The plant's designed capacity is 1.00 (likely in thousand cubic meters per day or similar unit), indicating a moderate scale. The plant's treated effluent is discharged into local watercourses that drain into the Glomma River, Norway's longest river, which flows into the Oslofjord. The Oslofjord is an ecologically important marine environment supporting diverse aquatic life and serving as a key recreational area. Proper treatment helps protect water quality in this sensitive coastal ecosystem.
Environmental context
The plant discharges into the Glomma River basin, which flows southward into the Oslofjord, a fjord on the Skagerrak strait. The Oslofjord is a vital marine habitat for fish, seabirds, and marine mammals, and it supports commercial and recreational fisheries. Nutrient loading from upstream sources can contribute to eutrophication in the fjord's inner reaches, making effective wastewater treatment crucial for maintaining ecological balance.
Frequently asked questions
The plant is located at 38 Engerveien, Askim, Indre Østfold, Østfold, Norway, serving the Askim area.
The plant serves approximately 30,019 people, classifying it as a medium-sized agglomeration under EU and Norwegian regulations.
Treated effluent is discharged into local watercourses that flow into the Glomma River, which ultimately reaches the Oslofjord.
As a Norwegian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), implemented through national regulations. For agglomerations of this size, secondary treatment is required, with tertiary treatment in sensitive areas.
Under the EU UWWTD, agglomerations between 10,000 and 100,000 population equivalent require secondary treatment as a minimum. In sensitive areas like the Oslofjord catchment, tertiary treatment for nutrient removal may be required.
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