UWWTP ST MAARTENSDIJK ST ANNALAND - Closed Advanced Treatment Plant in Sint-Maartensdijk, Zeeland

UWWTP ST MAARTENSDIJK ST ANNALAND is a former wastewater treatment plant located in Sint-Maartensdijk, a town in the province of Zeeland, Netherlands. The plant was designed with a capacity of 6,300 cubic meters per day, serving the local community in the Tholen region. Its operational status is closed, indicating it is no longer active. As an advanced treatment facility, it was equipped to provide a high level of purification, likely including nutrient removal to protect sensitive receiving waters. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants in sensitive areas like Zeeland are required to meet stringent standards for nitrogen and phosphorus removal. The plant's design capacity suggests it served a medium-sized agglomeration. The plant is situated within 10 km of the coast, highlighting its role in protecting the marine environment of the North Sea. The treated effluent would have been discharged into local waterways that drain into the Oosterschelde or Grevelingen, both ecologically important estuaries. These waters support diverse aquatic life and are part of the Dutch Delta region, a critical area for migratory birds and fisheries.

The plant is located in Zeeland, a coastal province in the Rhine-Meuse-Scheldt delta. The receiving waters ultimately drain into the North Sea, a semi-enclosed sea with high ecological sensitivity. The Oosterschelde and Grevelingen estuaries are important for biodiversity, supporting shellfish beds, fish nurseries, and migratory bird populations. Advanced treatment was essential to prevent nutrient enrichment and protect these fragile ecosystems.