DOS AGUAS Wastewater Treatment Plant, Dos Aguas, Comunitat Valenciana, Spain

DOS AGUAS is a municipal wastewater treatment plant located in the small inland town of Dos Aguas, within the Comunitat Valenciana region of eastern Spain. The plant serves a population of 583 residents, reflecting its role in a rural, low-density community. Its location in the interior of Valencia province places it away from the Mediterranean coast, reducing direct marine discharge risks. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent above 2,000. Although the plant serves fewer than 2,000 people, the application of secondary treatment aligns with best practices for protecting local water quality. The designed capacity of 2,000 m³/day indicates the facility was built to accommodate potential growth or seasonal variations, while the current discharge volume of 75.83 m³/day suggests significant spare capacity. Treated effluent from the plant is discharged into a local watercourse that ultimately drains into the Júcar River basin, a major hydrological system in eastern Spain. The Júcar River flows eastward to the Mediterranean Sea, supporting irrigated agriculture and diverse aquatic habitats. The plant's secondary treatment helps reduce organic load and nutrients, protecting downstream ecosystems and water resources used for irrigation and recreation.

The plant discharges into a tributary of the Júcar River, which flows through the Comunitat Valenciana region to the Mediterranean Sea. The Júcar basin supports irrigated agriculture, wetlands, and diverse aquatic life, including fish species such as the Júcar chub. Secondary treatment reduces organic pollution and nutrient loads, helping to prevent eutrophication in downstream water bodies and the coastal marine environment.