Nidos aglomeracija Wastewater Treatment Plant, Neringa, Lithuania

Nidos aglomeracija is a municipal wastewater treatment plant located in Neringa, within the Klaipėda County of Lithuania. The facility serves a population of around 2,970 residents and is situated in the coastal region of the Curonian Spit, a unique sand-dune peninsula along the Baltic Sea. 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 of this size. With a designed capacity of 6,700 m³/day and a current discharge volume of 415.28 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations in tourist population. Treated wastewater from the plant is discharged into the Curonian Lagoon, a large freshwater lagoon connected to the Baltic Sea. The lagoon is an ecologically sensitive area that supports diverse aquatic life and serves as an important migratory corridor for birds. The plant's operation is critical to protecting the lagoon's water quality and the broader Baltic Sea ecosystem.

The plant discharges into the Curonian Lagoon, which flows into the Baltic Sea via the Klaipėda Strait. The lagoon is a shallow, brackish water body that supports a rich ecosystem, including fish spawning grounds and migratory bird habitats. The area is ecologically sensitive due to its unique coastal dune landscape and the need to maintain low nutrient levels to prevent eutrophication.