Krynki Wastewater Treatment Plant - Poland | Secondary Treatment, Kamienna River Basin

The Krynki wastewater treatment plant is located in the village of Krynki, within gmina Brody, powiat starachowicki, województwo świętokrzyskie, Poland. It serves a population of approximately 5,900, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant is situated near the Kamienna River basin, an area characterized by mixed agricultural and rural land use. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size discharging into freshwater. With a designed capacity of 5,900 m³/day and an actual discharge volume of 844 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal flow variations. Secondary treatment typically involves biological oxidation and settling to reduce organic matter and suspended solids. Treated effluent from Krynki is discharged into local watercourses that ultimately drain into the Kamienna River, a tributary of the Vistula River, which flows into the Baltic Sea. The plant plays a key role in protecting the Kamienna River and downstream ecosystems from nutrient pollution and pathogens, supporting water quality for aquatic life and downstream communities.

The Krynki plant discharges into the Kamienna River catchment, part of the Vistula River basin that drains into the Baltic Sea. The Kamienna River supports diverse aquatic habitats and is used for recreation and fishing. The plant's secondary treatment helps reduce organic and nutrient loads, mitigating eutrophication risks in the Baltic Sea, which is sensitive to nitrogen and phosphorus inputs.