Kamionki Wastewater Treatment Plant, Kamionki, Poland

Kamionki wastewater treatment plant is located in the village of Kamionki, within gmina Łączna, powiat skarżyski, województwo świętokrzyskie, Poland. The facility serves a population of 1,869 and operates with secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 2,477 m³/day and currently treats an average daily flow of 266.49 m³/day, indicating significant spare capacity. As a secondary treatment plant, it removes organic matter and suspended solids, meeting EU requirements for inland freshwater discharge. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward to the Baltic Sea. The plant plays a key role in protecting the region's surface water quality and supporting the ecological health of downstream aquatic habitats.

The plant discharges into local streams that are part of the Vistula River basin, Poland's largest river system. The Vistula flows through central Poland and empties into the Baltic Sea via the Gdańsk Bay. The watershed supports diverse aquatic life and provides important ecosystem services, including water supply and flood regulation. Secondary treatment helps reduce nutrient and organic pollution, protecting downstream water quality and the sensitive Baltic Sea environment.