Oczyszczalnia sciekow - Stary Garwarz Wastewater Treatment Plant, Poland

Oczyszczalnia sciekow is a municipal wastewater treatment plant located in Stary Garwarz, a village in the Mazowieckie Voivodeship of central Poland. The plant serves a population of 2,929 and is part of the local infrastructure managed by the gmina of Glinojeck. Its location in the agricultural landscape of the Ciechanów district places it within a region dominated by small settlements and rural development. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. The designed capacity of 10,083 m³/day indicates the facility is sized to handle peak flows, while the actual discharge volume of 417.63 m³/day suggests current loads are well within capacity. The plant operates under Polish environmental regulations, which transpose EU directives into national law. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, the largest river system in Poland. The Vistula flows northward into the Baltic Sea, making the plant's performance important for the ecological health of both local streams and the broader Baltic catchment. The surrounding area supports agricultural activities and diverse aquatic habitats.

The plant discharges into small streams within the Wkra River catchment, a tributary of the Narew River, which flows into the Vistula and then the Baltic Sea. The local watershed supports agricultural runoff and seasonal flow variations, making consistent treatment essential to prevent nutrient enrichment. The downstream environment includes ecologically sensitive areas that rely on good water quality for biodiversity.