Vainodes ciema NAI Wastewater Treatment Plant, Vaiņodes pagasts, Latvia

Vainodes ciema NAI (Notekūdeņu Attīrīšanas Iekārtas) is a wastewater treatment facility located in Vaiņodes pagasts, Dienvidkurzemes novads, Latvia. The plant serves a small population of 92 residents and is classified as a secondary treatment facility. It is currently closed, with no operational status. The plant was designed with a capacity of 1505 cubic meters per day, though its actual discharge volume is 17.56 cubic meters per day. As a secondary treatment plant, it would have provided biological treatment to reduce organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations under 2000 population equivalent are subject to less stringent requirements, but secondary treatment is still a common standard. The plant's treated effluent likely discharged into a local watercourse within the Bartuva River basin, which flows into the Baltic Sea. Improving treatment efficiency and environmental protection in the area.

The plant is located in the Dienvidkurzemes region of Latvia, an area characterized by agricultural land and small settlements. The nearest major river is the Bartuva, which flows into the Baltic Sea via the Liepāja Lake system. The Baltic Sea is a sensitive marine environment with limited water exchange, making it vulnerable to nutrient pollution. The plant's secondary treatment would have helped reduce organic loads, but its closure may shift treatment to a larger facility with potentially higher standards.