Pietrowice Male Wastewater Treatment Plant, Brodno, Poland

Pietrowice Male is a wastewater treatment plant located in Brodno, within the gmina Środa Śląska, województwo dolnośląskie, Poland. The plant serves a population of 1,209 and operates with secondary treatment, discharging an average volume of 172.38 m³ per day. Its designed capacity is 7,899 m³ per day, indicating significant reserve capacity for future growth. As a secondary treatment facility, Pietrowice Male meets the minimum requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations under 2,000 population equivalent. The directive mandates secondary treatment for all discharges from agglomerations above 2,000 PE, but smaller plants like this one are subject to national regulations that typically require appropriate treatment to protect local water quality. The plant discharges treated wastewater into local watercourses that ultimately drain into the Oder River basin. The Oder flows northward through western Poland, forming part of the border with Germany, before emptying into the Baltic Sea via the Szczecin Lagoon. The region's aquatic ecosystems benefit from the plant's secondary treatment, which reduces organic load and protects downstream habitats.

The plant's discharge enters local streams within the Oder River basin, which flows through the Lower Silesian region. The Oder River supports diverse aquatic life and is an important migratory corridor for fish species. Downstream, the river feeds the Szczecin Lagoon, a brackish water ecosystem that provides critical habitat for birds and fish before reaching the Baltic Sea. The secondary treatment helps maintain water quality in this ecologically sensitive watershed.