Dynow Wastewater Treatment Plant, Dynów, Poland | Secondary Treatment Facility

The Dynow wastewater treatment plant is located in Dynów, a town in the Podkarpackie Voivodeship of southeastern Poland. It serves a population of 2,173, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size. As a secondary treatment facility, the Dynow plant uses biological processes to reduce organic matter and suspended solids. Its designed capacity of 6,850 m³/day significantly exceeds the current discharge volume of 309.84 m³/day, indicating ample headroom for future growth. The plant operates under Poland's implementation of the EU directive, which mandates compliance with effluent quality standards for biochemical oxygen demand, chemical oxygen demand, and total suspended solids. The treated effluent from the Dynow plant is discharged into a local watercourse that ultimately drains into the San River, a major tributary of the Vistula River. The Vistula flows northward through Poland into the Baltic Sea. The plant plays a key role in protecting the San River basin from nutrient pollution and safeguarding downstream aquatic ecosystems.

The Dynow plant discharges into a local stream that feeds the San River, a major right-bank tributary of the Vistula. The San River supports diverse aquatic life and is an important migratory corridor for fish species. The Vistula River basin ultimately drains into the Baltic Sea, a semi-enclosed sea sensitive to eutrophication from nutrient inputs. Secondary treatment at Dynow helps reduce the load of organic pollutants and nutrients reaching these downstream waters.