UWWTP Straza Sela pri Strazi - Secondary Treatment Plant in Potok, Slovenia

UWWTP Straza Sela pri Strazi is a municipal wastewater treatment plant located in Potok, a settlement within the municipality of Straza in southeastern Slovenia. The plant serves a population of approximately 904 people, placing it in the small agglomeration category under Slovenian and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 5,000 cubic meters per day, and the current discharge volume is 312.10 cubic meters per day, indicating ample reserve capacity. The plant operates under Slovenian national regulations that implement EU directives. The treated effluent is discharged into local watercourses that ultimately drain into the Krka River, a tributary of the Sava River, which flows into the Danube River and eventually the Black Sea. The plant plays a key role in protecting the water quality of the Krka River basin, which supports diverse aquatic life and is used for recreation and agriculture.

The plant discharges into the Krka River basin, which flows into the Sava River, a major tributary of the Danube. The Krka River is known for its karst landscape and supports sensitive aquatic ecosystems, including fish species and macroinvertebrates. Downstream, the Sava River is an important waterway for the region, eventually reaching the Black Sea. The plant's secondary treatment helps reduce nutrient and organic pollution, protecting these downstream environments.