Piskrzyn Wastewater Treatment Plant, Sydzyna, Poland

Piskrzyn is a wastewater treatment plant located in Sydzyna, within the gmina Rytwiany, powiat staszowski, in the świętokrzyskie voivodeship of Poland. It serves a small population of 129 people, reflecting its role in a rural or small community setting. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent below 2000. The designed capacity is 2405 m³/day, while the actual discharge volume is 18.39 m³/day, indicating a low utilization rate. The treated effluent is discharged into the local watershed, which ultimately drains into the Vistula River basin. The Vistula flows northward through Poland into the Baltic Sea, making the plant's operations relevant to the ecological health of this major European river system and the Baltic Sea coastal environment.

The plant discharges into the Vistula River basin, which is the largest river system in Poland. The Vistula flows into the Baltic Sea, a semi-enclosed sea sensitive to nutrient pollution. Secondary treatment reduces organic load but may not fully remove nutrients, so the plant's discharge contributes to the overall nutrient balance in the watershed, affecting downstream aquatic life and coastal ecosystems.