Hohenwutzen Wastewater Treatment Plant, Bad Freienwalde (Oder), Brandenburg

The Hohenwutzen wastewater treatment plant is located in the Oderaue district of Bad Freienwalde (Oder), in the state of Brandenburg, Germany. It served a population of approximately 1,987 people before its operational status was listed as closed. The plant was situated near the Oder River, which forms the border with Poland and flows into the Baltic Sea. As an advanced treatment facility, Hohenwutzen employed tertiary-level processes to remove nutrients and other pollutants beyond secondary standards. This level of treatment is typical for plants in sensitive areas under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for agglomerations over 10,000 population equivalent discharging into sensitive areas. Although Hohenwutzen served fewer than 2,000 people, its advanced treatment reflects a high standard of environmental protection. The plant's discharge likely entered the Oder River, a major waterway in Central Europe that drains into the Szczecin Lagoon and then the Baltic Sea. The Oder basin supports diverse aquatic life and is an important ecological corridor. The advanced treatment at Hohenwutzen helped reduce nutrient loads, protecting downstream water quality and the sensitive Baltic Sea ecosystem from eutrophication.

Hohenwutzen is located near the Oder River, which flows northward to the Szczecin Lagoon and ultimately the Baltic Sea. The Oder basin is ecologically significant, supporting diverse fish species and migratory birds. Advanced treatment at the plant helped minimize nutrient and pollutant discharges, protecting the river's water quality and the sensitive Baltic Sea from eutrophication and algal blooms.