PATERNO Wastewater Treatment Plant, Avezzano, Italy

PATERNO is a wastewater treatment plant located in Avezzano, in the L'Aquila province of Italy. It serves a population of 4,823 and operates under the regulatory framework of the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant provides secondary treatment, which is the standard level for inland communities under EU directives. The plant operates well within its capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into the local watershed, which ultimately drains into the Tyrrhenian Sea via the Liri-Garigliano river system. The plant plays a key role in protecting the water quality of the region's rivers and downstream coastal environment, supporting aquatic life and preventing eutrophication in sensitive areas.

The plant discharges into the local watershed that feeds into the Liri River, which flows into the Garigliano River and eventually reaches the Tyrrhenian Sea. This coastal area supports diverse marine life and is important for regional fisheries. The secondary treatment provided by the plant helps reduce nutrient loads, protecting downstream ecosystems from excessive algal growth and maintaining water quality for recreational and ecological uses.