SON BOU Wastewater Treatment Plant, Alaior, Menorca, Spain

SON BOU is a wastewater treatment plant located in Alaior on the island of Menorca, part of the Balearic Islands, Spain. It serves a small population of 1,118 people, reflecting its role in a rural or tourist-oriented area. The plant is situated near the coast, within 10 km of the Mediterranean Sea. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 2,500 m³/day and a current discharge volume of 217.10 m³/day, it operates well below its capacity, indicating room for future growth or seasonal demand. As a Spanish facility, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment levels based on the sensitivity of receiving waters. The treated effluent is discharged into the Mediterranean Sea, likely via a coastal outfall. The Balearic Islands are a ecologically sensitive region with important marine habitats, including seagrass meadows and coastal wetlands. The advanced treatment helps protect these ecosystems from nutrient pollution, supporting biodiversity and water quality in the surrounding waters.

SON BOU discharges treated wastewater into the Mediterranean Sea near the coast of Menorca. The Balearic Sea supports diverse marine life, including Posidonia oceanica seagrass meadows, which are crucial for carbon sequestration and coastal protection. Advanced treatment reduces nutrient loads, helping to prevent eutrophication and maintain water quality in this ecologically sensitive island environment.