Miejska oczyszczalnia sciekow w Choszcznie - Municipal Wastewater Treatment Plant in Choszczno, Poland

Miejska oczyszczalnia sciekow w Choszcznie is a municipal wastewater treatment plant located in Choszczno, in the zachodniopomorskie province of northwestern Poland. The plant serves a population of approximately 17,108 people, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). As a Polish facility, the plant is subject to national regulations transposing the EU UWWTD, which requires secondary treatment for agglomerations of this scale. The regulatory framework ensures compliance with effluent standards for biological oxygen demand, chemical oxygen demand, and suspended solids. The treated wastewater is discharged into a local watercourse that eventually drains into the Oder River basin and ultimately the Baltic Sea. The plant plays a key role in protecting the region's surface waters and the sensitive coastal environment of the Baltic Sea from nutrient pollution.

The plant discharges into a local tributary of the Oder River, which flows into the Szczecin Lagoon and then the Baltic Sea. The Baltic Sea is a semi-enclosed, brackish sea sensitive to eutrophication from nutrient inputs. The plant's treatment performance is critical for reducing nitrogen and phosphorus loads that can cause algal blooms and oxygen depletion in downstream waters.