Ettringen Wastewater Treatment Plant, Bavaria | Advanced Treatment for 4,500 Residents

The Ettringen wastewater treatment plant is located in the municipality of Ettringen in the Bavarian district of Unterallgäu, Germany. It serves a population of approximately 4,500 residents and operates as a key component of the local sanitation infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 6,000 m³/day and an average daily discharge of 609 m³, the facility has ample capacity to handle current and future loads. Treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin, contributing to the protection of downstream ecosystems. The advanced treatment level helps minimize nutrient and pollutant loads, supporting water quality in the region's rivers and streams.

The plant's discharge enters small streams in the Unterallgäu region, which flow into the Wertach River, a tributary of the Lech, and eventually the Danube. This watershed supports diverse aquatic life and is part of a larger network of rivers that drain into the Black Sea. The advanced treatment helps protect sensitive downstream habitats from eutrophication and pollution.