SIONE Wastewater Treatment Plant, Monte San Giovanni Campano, Lazio

SIONE is an advanced wastewater treatment plant located in Anitrella, a frazione of Monte San Giovanni Campano, in the province of Frosinone, Lazio, Italy. The plant serves a small population of 319 residents, reflecting its role in a rural or small community setting within the Lazio region. The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 400 cubic meters per day and a current discharge volume of 63.15 cubic meters per day, the plant operates well below its capacity. As an Italian facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels based on the sensitivity of receiving waters and population size. The treated effluent is discharged into local watercourses that eventually drain into the Tyrrhenian Sea via the Liri-Garigliano river system. The plant's advanced treatment helps protect downstream aquatic ecosystems, including the Liri River and the Garigliano estuary, which support diverse freshwater and coastal species.

The plant discharges into the Liri River basin, which flows into the Garigliano River and ultimately reaches the Tyrrhenian Sea. The Liri-Garigliano system supports diverse aquatic life, including fish species such as trout and eels, and provides important habitat for migratory birds. Advanced treatment at SIONE helps minimize nutrient loading and protects water quality in this ecologically sensitive riverine and coastal environment.