Castiglione Messer Marino Wastewater Treatment Plant - Abruzzo, Italy

The Castiglione Messer Marino wastewater treatment plant is located in the town of Castiglione Messer Marino, in the province of Chieti, Abruzzo, Italy. It serves a population of approximately 1,800 residents, making it a small-scale municipal facility. The plant is situated inland, more than 10 km from the coast, and its operations are part of the local water management infrastructure. The plant provides primary treatment, which involves physical processes such as sedimentation to remove solids. With a designed capacity of 800 cubic meters per day and a current discharge volume of 356.34 cubic meters per day, the facility operates below its maximum capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations like this one are generally required to provide appropriate treatment, though primary treatment may be acceptable in certain contexts. The treated effluent is discharged into local watercourses that ultimately drain into the Adriatic Sea. The plant plays a role in protecting the quality of these water bodies, which support diverse aquatic life and are important for the regional ecosystem. Its inland location reduces direct marine impact, but proper treatment remains essential for downstream environmental health.

The plant discharges into local streams that flow toward the Adriatic Sea, a semi-enclosed basin with sensitive marine ecosystems. The watershed supports diverse aquatic habitats and is important for regional biodiversity. Effective treatment helps prevent nutrient and pollutant loading that could affect coastal waters and marine life.