Casasimarro Wastewater Treatment Plant, Casasimarro, Castilla-La Mancha, Spain

The Casasimarro wastewater treatment plant is located in the municipality of Casasimarro, within the autonomous community of Castilla-La Mancha, Spain. The facility serves a population of approximately 6,027 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant operates with secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with effluent quality standards. The treated effluent is discharged into a local watercourse that ultimately drains into the Júcar River basin, which flows eastward to the Mediterranean Sea. The plant plays a key role in protecting local water quality and supporting the ecological health of the Júcar River system.

The plant discharges into a tributary of the Júcar River, which flows through the Castilla-La Mancha region before reaching the Mediterranean Sea. The Júcar basin supports diverse aquatic life and is an important water resource for agriculture and urban areas. The secondary treatment provided helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream water bodies.