KA Achim Wastewater Treatment Plant, Achim, Niedersachsen

KA Achim (3610012004) is a municipal wastewater treatment plant located in Achim, Niedersachsen, Germany, serving a population of around 39,286. The plant is situated in the Weser River basin and plays a key role in managing wastewater for the Achim area, which is part of the larger Bremen metropolitan region. As a German plant serving a population equivalent of approximately 39,000, KA Achim operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant is also subject to Germany's national water management regulations, which enforce strict effluent standards to protect water quality in the Weser catchment. The treated effluent from KA Achim ultimately flows into the Weser River, which drains into the North Sea. This makes the plant's performance important for the ecological health of the Weser estuary and the marine environment, supporting aquatic life and reducing nutrient loads that can cause eutrophication in coastal waters.

KA Achim discharges into the Weser River basin, which flows northward through Niedersachsen and into the North Sea near Bremerhaven. The Weser is a major European river supporting diverse fish species and migratory birds. The plant's location in the lower Weser region means its effluent contributes to the overall water quality of the estuary, which is ecologically sensitive due to tidal dynamics and its role as a nursery for marine life.