Cerreto d'Esi Pian del Morro Dep Wastewater Treatment Plant, Cerreto d'Esi, Italy

Cerreto d'Esi Pian del Morro Dep is a wastewater treatment plant located in Cerreto d'Esi, a town in the province of Ancona, Marche region, Italy. The plant serves a small population of 50 people and has a designed capacity of 500 cubic meters per day, indicating it is sized for a larger community than currently served. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland agglomerations of this scale. The plant operates under Italy's implementation of the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for all discharges from agglomerations with a population equivalent above 2,000. Although the current population served is small, the plant's capacity suggests it may serve a larger catchment or future growth. The discharge volume of 35.00 cubic meters per day is well within the designed capacity. The treated effluent is discharged into a local watercourse that eventually drains into the Adriatic Sea via the Esino River basin. The Marche region is characterized by hilly terrain and a Mediterranean climate, with rivers that support diverse aquatic life. Proper treatment is essential to protect downstream water quality and the ecological health of the Adriatic coastal zone.

The plant discharges into a tributary of the Esino River, which flows eastward through the Marche region and empties into the Adriatic Sea near Falconara Marittima. The Esino River basin supports a variety of freshwater species and provides habitat for migratory fish. The Adriatic Sea in this area is ecologically sensitive, with seagrass meadows and important nursery grounds for marine life. Effective wastewater treatment helps prevent nutrient enrichment and pollution that could harm these downstream ecosystems.