Overview
PRELI wastewater treatment plant serves Chiavari in Liguria, Italy, with a population equivalent of 33,000. The facility is located near the coast and discharges into the Ligurian Sea.
PRELI is a wastewater treatment plant located in Sant'Andrea di Rovereto, Chiavari, in the Liguria region of Italy. It serves a population of approximately 33,000 people, placing it in the medium agglomeration category under EU regulations. The plant is situated near the coast, within 50 km of the Ligurian Sea. As a plant serving a population between 10,000 and 150,000, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. The plant operates under Italian national regulations implementing the directive. The treated effluent from PRELI ultimately discharges into the Ligurian Sea, a part of the Mediterranean Sea. This coastal discharge requires careful management to protect marine water quality and local ecosystems. The plant plays a key role in safeguarding the coastal environment of the Italian Riviera, supporting tourism and marine biodiversity.
Environmental context
The PRELI plant discharges into the Ligurian Sea, a basin of the Mediterranean Sea. The coastal waters in this region support diverse marine life, including seagrass meadows and fish populations. The plant's location near the coast means that treated effluent must meet stringent standards to prevent nutrient enrichment and protect sensitive marine habitats. The local watershed includes small rivers draining the Ligurian Apennines, which flow into the sea and contribute to the coastal ecosystem.
Frequently asked questions
PRELI is located in Sant'Andrea di Rovereto, Chiavari, in the province of Genova, Liguria, Italy.
The plant serves approximately 33,000 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent from PRELI is discharged into the Ligurian Sea, a coastal water body of the Mediterranean Sea.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size, implemented through Italian national legislation.
Under the EU directive, plants serving between 10,000 and 150,000 population equivalent are required to have at least secondary treatment. In sensitive areas, tertiary treatment may be required to remove nutrients.
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