Katy Wastewater Treatment Plant, Grywałd, Poland - Closed Secondary Facility

Katy wastewater treatment plant is located in Grywałd, a village in the gmina Krościenko nad Dunajcem, powiat nowotarski, województwo małopolskie, Poland. The plant was designed with a capacity of 450 cubic meters per day and provided secondary treatment for the local population. It is now closed and no longer in operation. As a secondary treatment facility, Katy would have met the standards required under Polish regulations, which transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations, secondary treatment is typically sufficient to reduce organic matter and suspended solids before discharge. The area is part of the Dunajec River basin, which flows into the Vistula River and eventually to the Baltic Sea. The Dunajec is a key river in the region, supporting diverse aquatic life and providing water for agriculture and recreation.

The plant was situated in the Dunajec River basin, a tributary of the Vistula River. The Dunajec flows through the Pieniny Mountains and is known for its scenic gorges and biodiversity. Downstream, the Vistula carries water to the Baltic Sea, making the treatment of wastewater important for protecting both local freshwater ecosystems and the marine environment. The region is ecologically sensitive due to its mountainous terrain and tourism.