Ehrbachtal Ney Wastewater Treatment Plant, Dieler, Rheinland-Pfalz

Ehrbachtal Ney is an advanced wastewater treatment plant located in the small village of Dieler, within the municipality of Ney in the Hunsrück-Mittelrhein region of Rheinland-Pfalz, Germany. The plant serves a population of approximately 2,280 residents and has a designed capacity of 4,000 m³/day, with a current discharge volume of 376.35 m³/day, indicating it operates well below its capacity. As an advanced treatment facility, Ehrbachtal Ney goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (2,280 PE), the directive requires secondary treatment as a minimum, but the plant's advanced level suggests it discharges into a sensitive area or is designed to meet stringent local water quality standards. The plant's treated effluent is discharged into local waterways that eventually drain into the Rhine River basin, a major European waterway. The Rhine and its tributaries support diverse aquatic ecosystems and are vital for drinking water, agriculture, and industry. By providing advanced treatment, Ehrbachtal Ney helps protect downstream water quality and the ecological health of the Rhine basin.

The plant discharges into small streams in the Hunsrück region, which flow into the Moselle River, a major tributary of the Rhine. The Rhine basin is ecologically significant, supporting diverse fish species and serving as a migratory corridor for Atlantic salmon and eels. Advanced treatment at this plant helps reduce nutrient loading, protecting downstream aquatic habitats and drinking water sources in the densely populated Rhine valley.