ZV Oberes Rothal Sitz Unterroth Wastewater Treatment Plant, Unterroth, Bavaria

ZV Oberes Rothal Sitz Unterroth is a wastewater treatment plant located in Unterroth, Bavaria, Germany. It serves a population of 1,870 and was designed with a capacity of 2,500 m³/day. The plant is currently closed, but its advanced treatment level reflects the high standards required for sensitive areas under the EU Urban Waste Water Treatment Directive. As an advanced treatment facility, it likely employed processes such as nutrient removal to protect receiving waters. The plant's scale corresponds to a small agglomeration under EU regulations, which typically require secondary treatment as a minimum. The advanced level indicates additional phosphorus or nitrogen removal, common in catchments draining to ecologically sensitive water bodies. The plant's discharge volume of 473.25 m³/day would have entered local streams in the Danube basin. The region's water bodies ultimately drain to the Danube River and the Black Sea, supporting diverse aquatic life. The plant's closure may reflect consolidation with nearby facilities to improve efficiency and environmental performance.

The plant is located in the Danube River basin, with treated effluent historically discharging into local tributaries that flow into the Danube and eventually the Black Sea. The region supports diverse aquatic ecosystems, including fish spawning habitats and migratory corridors. Advanced treatment helps reduce nutrient loads, protecting downstream water quality in this ecologically important basin.