Marktl Wastewater Treatment Plant, Stammham, Bavaria

Marktl is a wastewater treatment plant located in Stammham, part of the Marktl administrative community in the Altötting district of Bavaria, Germany. The plant serves a population of approximately 5,564 people and is classified as providing advanced treatment, which goes beyond the standard secondary treatment required by the EU Urban Waste Water Treatment Directive. With a designed capacity of 6,000 cubic meters per day and an actual discharge volume of 642.25 cubic meters per day, the plant operates well below its capacity, indicating potential for future growth. As a German facility, it operates under the national implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels based on the size of the agglomeration and the sensitivity of the receiving waters. The treated effluent from Marktl is discharged into the local watershed, which ultimately drains into the Inn River and then the Danube, flowing into the Black Sea. The plant's advanced treatment helps protect the ecological health of these downstream water bodies, supporting aquatic life and water quality in the region.

The plant discharges into the local water system, which feeds into the Inn River, a major tributary of the Danube. The Danube basin is one of Europe's most important river systems, supporting diverse aquatic ecosystems and providing water for millions of people. The advanced treatment at Marktl helps reduce nutrient loads and pollutants, protecting the ecological integrity of the downstream environment, including sensitive habitats along the Inn and Danube rivers.