Mirsk Wastewater Treatment Plant | Lower Silesia, Poland

The Mirsk wastewater treatment plant is located in the town of Mirsk, within the Lower Silesian Voivodeship of Poland. Serving a population of approximately 1,283, this facility is a key component of the local municipal infrastructure, ensuring that wastewater from the community is treated before discharge. As a secondary treatment plant, Mirsk meets the standard required under Polish regulations, which transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations under 2,000 population equivalent, secondary treatment is typically sufficient to protect receiving waters. The plant has a designed capacity of 7,617 m³, with current discharge volumes around 183 m³ per day, indicating ample capacity for current loads. The treated effluent from the plant is discharged into local watercourses that ultimately drain into the Oder River basin. The Oder flows northward through Poland and into the Baltic Sea, making the plant's performance important for both local stream health and downstream water quality in the Baltic region. Proper treatment helps reduce nutrient loads and protect aquatic ecosystems.

The Mirsk plant discharges into small streams that feed into the Bóbr River, a tributary of the Oder River. The Oder flows through western Poland and empties into the Szczecin Lagoon and the Baltic Sea. This watershed supports diverse aquatic life and is an important ecological corridor. The plant's secondary treatment helps control nutrient pollution, which is critical for preventing eutrophication in the sensitive Baltic Sea environment.