Dittelsheim Hessloch Wastewater Treatment Plant, Dittelsheim-Heßloch, Rheinland-Pfalz

Dittelsheim Hessloch is an advanced wastewater treatment plant located in Dittelsheim-Heßloch, a municipality in the Wonnegau region of Rheinland-Pfalz, Germany. The plant serves a population of 3,450 and has a designed capacity of 5,500 cubic meters per day, with a current discharge volume of 583.67 cubic meters per day. As an advanced treatment facility, it 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). Germany implements this directive through national legislation, requiring advanced treatment for agglomerations above 10,000 population equivalent in sensitive areas; however, smaller plants like this one may also adopt advanced treatment to protect local water quality. The plant discharges treated wastewater into local watercourses that ultimately drain into the Rhine River basin. The Rhine is a major European waterway flowing through Germany into the North Sea. The plant's advanced treatment helps protect the ecological health of the Rhine and its tributaries, supporting diverse aquatic life and reducing nutrient loads that could cause eutrophication downstream.

The plant is located inland in the Upper Rhine region, approximately 8 km from the Rhine River. Treated effluent flows into small streams that feed the Rhine, which then drains into the North Sea. The Rhine basin supports important fish species such as salmon and eel, and advanced treatment helps maintain water quality for these migratory species and overall ecosystem health.