COV Okrisky Wastewater Treatment Plant, Petrovice, Kraj Vysočina

COV Okrisky is a municipal wastewater treatment plant located in Petrovice, a village in the Kraj Vysočina region of the Czech Republic. The plant serves a population of approximately 1,647 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size. With a designed capacity of 2,200 m³/day and an average daily discharge volume of 415.93 m³, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into a local watercourse that ultimately drains into the Jihlava River, a tributary of the Dyje River, which flows into the Morava River and then the Danube River basin. This connection to the Danube highlights the plant's role in protecting downstream ecosystems, including the Black Sea.

The plant discharges into a small stream that feeds the Jihlava River, part of the Danube basin. The downstream environment includes the Dyje River and the Morava River, which support diverse aquatic life and are important for regional biodiversity. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting these water bodies from eutrophication.