Overview
Lenggries wastewater treatment plant serves approximately 15,500 people in Bavaria, Germany. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this size.
The Lenggries wastewater treatment plant is located in the municipality of Lenggries in the Bavarian district of Bad Tölz-Wolfratshausen, Germany. It serves a population of about 15,500 residents in this Alpine foothill region. As a German plant serving between 10,000 and 100,000 people, it is classified as a medium agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive requires secondary treatment for all discharges to freshwater, and more advanced treatment if the receiving waters are sensitive to eutrophication. The plant's treatment process and capacity details are not publicly available, but it is expected to meet these EU standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Isar River, a major tributary of the Danube. The Isar flows through Munich and eventually reaches the Black Sea via the Danube. The plant plays a key role in protecting the water quality of the Isar, which supports diverse aquatic life and is used for recreation.
Environmental context
The plant discharges into the Isar River basin, which flows northward through Bavaria to join the Danube near Deggendorf. The Danube then carries water to the Black Sea. The Isar is an ecologically sensitive river, supporting fish species such as grayling and brown trout, and its water quality is important for downstream ecosystems and drinking water supplies.
Frequently asked questions
The Lenggries wastewater treatment plant is located in the municipality of Lenggries, in the district of Bad Tölz-Wolfratshausen, Bavaria, Germany.
The plant serves approximately 15,500 people in the Lenggries area.
The plant protects the Isar River, which flows through Bavaria and joins the Danube. The Danube ultimately reaches the Black Sea.
As a medium agglomeration (10,000-100,000 people), the plant is required to provide secondary treatment under the EU Urban Waste Water Treatment Directive (91/271/EEC). If the receiving waters are sensitive, tertiary treatment may also be required.
In Germany, plants serving this population typically provide at least secondary biological treatment, often with nutrient removal to meet strict effluent standards set by the EU directive and national regulations.
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