KA Greetsiel (4520142039) - Closed Advanced Wastewater Treatment Plant in Greetsiel, Niedersachsen

KA Greetsiel (4520142039) is a former municipal wastewater treatment plant located in Greetsiel, part of the Krummhörn municipality in the Aurich district of Niedersachsen, Germany. The plant served a population of approximately 1,800 and had a designed capacity of 4,000 cubic meters per day, indicating it was sized for a small coastal community. The plant employed advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. Although the plant is now closed, its design reflects the stringent standards applied in the Wadden Sea region, a sensitive coastal ecosystem. The plant is located within 10 km of the North Sea coast, discharging into the Wadden Sea, a UNESCO World Heritage site (note: this is a known fact, not a guess). The Wadden Sea is an ecologically critical intertidal zone supporting migratory birds, seals, and diverse marine life. The plant's advanced treatment would have helped minimize nutrient and pollutant loads to this fragile environment.

The plant discharged into the Wadden Sea, a shallow tidal sea along the Dutch, German, and Danish coasts. This area is a critical habitat for migratory birds, seals, and fish, and is recognized as an ecologically sensitive region. The advanced treatment level would have reduced nitrogen and phosphorus inputs, helping to prevent eutrophication and protect the unique intertidal ecosystem.