Santa Barbara de Casa Wastewater Treatment Plant, Huelva, Andalusia

Santa Barbara de Casa wastewater treatment plant is located in the municipality of Santa Barbara de Casa, in the province of Huelva, Andalusia, Spain. The plant serves a population of approximately 1,980 people, classifying it as a small agglomeration under Spanish and EU regulations. As a secondary treatment facility, the plant provides biological treatment to reduce organic matter and suspended solids. The designed capacity is 1,400 cubic meters per day, with a reported discharge volume of 358.87 cubic meters per day. The plant is currently closed, and its operational status may reflect infrastructure upgrades or decommissioning. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Guadiana River basin. The region is characterized by a Mediterranean climate with dry summers, and the surrounding area includes agricultural and natural landscapes. Proper wastewater management is essential to protect local water quality and downstream ecosystems.

The plant discharges into the Guadiana River basin, which flows into the Gulf of Cadiz in the Atlantic Ocean. This watershed supports diverse aquatic life and is important for regional biodiversity. The area is ecologically sensitive due to its Mediterranean climate and agricultural pressures, making effective wastewater treatment crucial for maintaining water quality.