Overview
CALA wastewater treatment plant in Cala, Andalucía, Spain, serves a population of 2,613 with secondary treatment. The plant is currently closed and discharges 473.60 m³/day.
CALA is a wastewater treatment plant located in the municipality of Cala, within the Sierra de Huelva region of Andalucía, Spain. Designed to serve a population of 2,613, the plant provided secondary treatment before its closure. Its operational history reflects the infrastructure needs of a small inland community in southern Spain. The plant's designed capacity was 2,023.00 m³/day, with an actual discharge volume of 473.60 m³/day. As a secondary treatment facility, it would have met the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations under 10,000 population equivalent, which mandates secondary treatment for inland freshwater discharges. The treated effluent from CALA would have been discharged into local watercourses within the Guadiana River basin, which ultimately flows into the Gulf of Cádiz. The Sierra de Huelva area is ecologically sensitive, supporting Mediterranean forest and scrubland habitats. The plant's closure may have implications for local water quality management.
Environmental context
CALA is located inland in the Sierra de Huelva, part of the Guadiana River basin. The Guadiana River flows southward through Spain and Portugal, discharging into the Gulf of Cádiz (Atlantic Ocean). The region supports diverse aquatic and terrestrial ecosystems, including species adapted to Mediterranean climate conditions. Proper wastewater treatment is essential to protect downstream water quality and ecological health.
Frequently asked questions
The CALA plant is located in the municipality of Cala, in the Sierra de Huelva region of Andalucía, Spain. Its address is Camino del Palacio, Cala, Huelva.
The CALA plant was designed to serve a population of 2,613 people, classifying it as a small agglomeration under EU wastewater directives.
The CALA plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for inland freshwater discharges from agglomerations of this size.
The operational status of the CALA plant is listed as closed. It may be due to infrastructure upgrades, consolidation with nearby facilities, or changes in local wastewater management.
As a Spanish wastewater treatment plant, CALA operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), transposed into Spanish law. This directive sets minimum treatment requirements based on population served and receiving water sensitivity.
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