Candela Wastewater Treatment Plant, Candela, Puglia, Italy

The Candela wastewater treatment plant is located in the municipality of Candela, in the province of Foggia, Puglia, Italy. It serves a population of approximately 2,800 residents, classifying it as a small agglomeration under Italian and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure managed by local authorities. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 2,823 m³/day and currently discharges an average of 500 m³/day, indicating it operates well below its maximum capacity. The treated effluent is discharged into local watercourses that eventually drain into the Adriatic Sea via the Ofanto River basin. The plant plays a key role in protecting the water quality of the surrounding agricultural region and downstream aquatic ecosystems. Its secondary treatment ensures compliance with EU standards for inland freshwater discharge, supporting the ecological health of the local watershed.

The Candela plant discharges into the Ofanto River basin, which flows into the Gulf of Manfredonia in the Adriatic Sea. This watershed supports diverse aquatic life and is an important agricultural region. The plant's secondary treatment helps maintain water quality in the river system, reducing nutrient loads that could otherwise contribute to eutrophication in the coastal marine environment.