KA Hohegeiss Wastewater Treatment Plant, Braunlage, Lower Saxony

KA Hohegeiss is a municipal wastewater treatment plant located in the Bärenbachtal valley in Hohegeiss, part of the town of Braunlage in the district of Goslar, Lower Saxony, Germany. The plant serves a population of around 4,433 residents in this small Harz mountain community. As a German wastewater facility serving fewer than 10,000 people, the plant is classified as a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). German regulations typically require secondary biological treatment for such plants, with nutrient removal if discharging into sensitive areas. The treated effluent from KA Hohegeiss is discharged into local watercourses that drain into the Bode River system, a tributary of the Saale River, which ultimately flows into the Elbe River and the North Sea. The plant plays a key role in protecting the sensitive Harz mountain ecosystem and downstream water quality.

The plant discharges into the Bärenbachtal stream, which flows into the Warme Bode river, a headwater of the Bode River system. The Bode joins the Saale, then the Elbe, before reaching the North Sea. The Harz region features sensitive aquatic habitats supporting trout and other cold-water species. The plant's location in a mountainous area requires robust treatment to protect downstream ecosystems.