DEP_SANTA MARIA Wastewater Treatment Plant, Castelnuovo di Garfagnana, Tuscany

DEP_SANTA_MARIA is a wastewater treatment plant located in Castelnuovo di Garfagnana, a town in the Garfagnana region of Tuscany, Italy. The plant serves a small population of 148 residents, reflecting its role in a rural or small-scale community setting. The plant provides primary treatment, which involves physical processes like sedimentation to remove solids. It operates well below capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations like this may have less stringent requirements, but primary treatment is a basic level that reduces organic load before discharge. The treated effluent is discharged into local watercourses that eventually drain into the Serchio River basin, which flows through the Apuan Alps region and into the Ligurian Sea. The plant's inland location (over 10 km from the coast) reduces direct marine impact, but its discharge contributes to the overall water quality in the Serchio watershed, which supports diverse aquatic life and is used for irrigation and recreation.

The plant discharges into the Serchio River basin, which flows through the Garfagnana valley and the Apuan Alps before reaching the Ligurian Sea. The watershed supports diverse aquatic ecosystems, including fish populations and riparian habitats. As a primary treatment plant, its effluent may contain nutrients and organic matter that could affect downstream water quality, particularly in sensitive areas of the river.