Pienkowo Wastewater Treatment Plant, Grabowo, Poland

The Pienkowo wastewater treatment plant serves the community of Grabowo in województwo zachodniopomorskie, Poland. With a designed capacity of 2000 m³/day and a current discharge volume of 149.29 m³/day, it handles wastewater from a population of approximately 1,047 people. The plant is situated in a rural area near the Baltic Sea coast. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent standards before discharge. The treated effluent is discharged into local watercourses that ultimately drain into the Baltic Sea. The coastal location means the plant's discharge contributes to the nutrient load in the Baltic Sea, a sensitive marine environment prone to eutrophication. Proper treatment helps mitigate this impact, supporting the ecological health of the region's coastal waters.

The plant discharges into local streams that flow to the Baltic Sea, a semi-enclosed sea with limited water exchange. The Baltic Sea is highly sensitive to nutrient pollution, which can cause algal blooms and oxygen depletion. The secondary treatment at Pienkowo reduces organic and nutrient loads, helping to protect the coastal ecosystem and support biodiversity in the region.